COB Dimmable LED Downlight Rotatable LED Ceiling Lamp

• Light Source: LED surface light source,COB (Chip-on-Board) design
• Body Material: Aluminum.
• Radiator Temp:< 55 degree.
• Radiator Caft : 6063 aluminum cold forging.
• Environment-friendly and no UV or IR radiation.
• No dazzling and mild color with light bending effect.
• Long lifespan, low cost of maintenance.
• Transformer is at the COB LED Downlight directly attached, including a terminal block for power line .
• Easy to install and maintain, and normal base type E can be matched.
• Easy to install and maintain, replacement of traditional bulbs and no subsidiary fixture.
• Available for Switch controll (dimmable) or Non dimmable types.
• Swivel range : 30 °

COB LED Downlight Speciality : Compatible with most SCR dimmer,integration of controlling several light available,no flicker.

COB Dimmable LED Downlight Rotatable LED Ceiling Lamp ( option of dimmable or not-dimmable )
Nominal voltage(product)	Ac85 - 265V
Operating frequency	50 - 60 Hz
Lifespan	30,000 H
Radiator temp :	< 55°C
Power factor :	> 0.9
Casing material	Radiator temp : 6063 aluminum cold forging Body material:aluminum
Style No#	AL-OCL203	AL-OCL205	AL-OCL303	AL-OCL305
Wattage	2 Light × 3w	2 Light × 5w	3 Light × 3w	3 Light × 5w
Luminous flux	Warm white : > 360 Lm Cool white : > 420 Lm Nature white : > 480 Lm	Warm white : > 600 Lm Cool white : > 700 Lm Nature white : > 800 Lm	Warm white : > 540 Lm Cool white : > 630 Lm Nature white : > 720 Lm	Warm white : > 900 Lm Cool white : > 1050 Lm Nature white : > 1200 Lm
Luminous efficacy	Warm white : 60 Lm/w Cool white : 70 Lm/w Nature white : 80 Lm/w
Color temperature	Warm white : 3000 K Cool white : 4000 K Nature white : 6400 K
Color rendering index Ra	Warm white : > 80 Ra Cool white : > 75 Ra Nature white : > 75 Ra
Light color	Warm white Cool white Nature white
Packging unit	Contains 10 Piece
Dimensions in H × W × L	210 mm × 280 mm × 580 mm
Gross weight	9.2 Kg
Volume	34.104 Cubic dec

This discreet Downligh ter with minimal design is the ideal solution for the lighting requirements of hotels, retail and fitness areas and spaces that require exact light from compact fittings that are easy to install and maintain.
Available in two versions - fixed and adjustable - Pinhole can be installed in false ceilings with thickness from 1 to 20 mm with stainless steel springs. The front ring contains an accessory-holding ring.

Dimmable LED Downlights are used widely for general ambient lighting in:

Home /office lighting,display case lighting
Under cabinet lighting
Art lighting

Designs Of LEDs - The Semiconductor Crystal:

Silicium belongs to the most frequent elements of the earth's crust. It occurs however not purely, but as SiO2 (silicium dioxide or quartz)and must be converted by precipitation processes into pure silicium.


Lattice defects in this crystal disturb however the movement of the electrons and in such a way that the crystalline pure silicium must be “cleaned?by a fusion procedure (Zohnenschmelz or Czochralski process) and "pulled" into large single crystals. These crystals has a diameter of 10-20 cm and a length of up to 2 meters. So a purity can be achieved by one foreign atom on 10 to high 9 Siliciumatomen.


This pure crystal is cut now into thin disks, called Wafern. Wafer costs today approx. around 1000, - Eur. The DOPING crucial for LEDs (addition of additives) can be achieved either with pulling the crystal or with the Wafern by vaporizing with 1000°C with the foreign atoms or by the bombardment with ions of the additive in small accelerators.

Now the endowed Wafern are cut into some hundred small “chips? which exhibit a thickness of only approx. 250 µm. These tiny small and hardly with free eye visible pieces of semiconductor crystal are responsible for the light generation of our LED.


Light emitting diodes are used into many different designs.


Mainly however plastics and synthetic resin applications for the lens are used. In addition, glass or metal housings is used with bright LEDs. LEDs zum Einsatz.


The plastic body, which is formed like a lens and lies over the crystal, lowers the limit angle of the total reflexion and bundles, therefore increases the radiating power.


With stronger LEDs also glass lenses are used. Metal housings, mostly from aluminum, take over mainly the task of the heat dissipation, thus cooling.

1)Wired LEDs

The Wired LED is at present still the most well-known LEDs because this design was already used for a very long time in electronics. They were mostly used however only as control small lamps.


When the luminous efficiency of semiconductor crystals became better and better, the wired LEDs became generally accepted in the lighting industry. Several wired LED in summary, are found nowadays in LED SPOTS, LED tubes, LED modules and LED chains.


The advantage of wired LEDs exists in very favorable production in the small heat emission and that they can very simply soldered. The most usual models of wired LEDs are 3mm, 5mm and 10mm diameter.


The reflector tub in that semiconductor crystal is embedded, is also the short leg of a wired LED and also the MINUS - (cathode). A further distinguishing feature for the Minusseite of a Bedrahteten LED is an easy flattening of the plastic shroud on this side.


Wired LEDs are produced in all colors also in RGB (RED, GREEN, BLUE). Either with automatic color change or automatic dialable. The automatic dialcash possess 4 legs (pin).

2) SMD LEDs ( Surface Mounted Device )

SMD means in german: Oberflächen montierbares Bauelement oder Bauelement für die Oberflächenmontage.


SMD LEDs possess not as the wired LED small wire connections, caled pins, but by means of solderable mating surfaces are soldered directly on the printed circuit board. Who does not use a printed circuit board, can naturally also wire connections on the mating surfaces solder.


Several SMD LED in summary, find nowadays with LED SPOTS, LED tubes and LED modules application.


SMD LED are made in different sizes, shapes of the housing and light-current strengths. By the enormous luminosity of some SMD LED, with which usually 3 or 4 semiconductor crystals are embedded in a SMD LED, they are used as flashlight LED in mobile phones or very compact digital cameras. Also in the automobile industry SMD LED are used for turn signals, stop light or daily headlight. SMD LEDs are produced in all colors also in RGB (RED, GREEN, BLUE).

3) Superflux LEDs ( Spider LEDs )

One could see superflux LED (or Spider LED called) as advancement of the wired LED.


They possess a large reflected beam angle and send their light laminar and are therefore better suitable for surface lighting. The four contact contacts (pin) do not only make a better heat dissipation and thus a high life span possible, but they can be headed also separately.Spider LED contains up to 4 semiconductor crystals (chips).


These advantages make those for superflux LED a perfect multi-chip carrier with infinitely many ranges of application.


Superflux are used in LED bulbs, LED tubes, LED modules and ever more frequently in addition, in the autolighting industry.

Here we know them as Soffitten in many different sizes and colors. In the advertising industry they are used e.g. for signature lighting or dia. assemblies.


Superflux LEDs are used for turn signals, stop light or daily headlight. SMD LEDs are produced in all colors also in RGB (RED, GREEN, BLUE).

4) COB LEDs( Chip on Board ) Power LEDs

COB LEDs the semiconductor crystals is directly contacted at the plate.


The chip on board technology is clearly the innovativste range of the semiconductor technology. With this technology the individual LED chips with the assistance of fully automatic Bondern are set directly on a gilded printed circuit board. This special procedure is called “Bonding? Subsequently, contacting is made to the antipole by a gold or aluminum wire.


The COB technology makes chip densities possible of up to 70 Chips/cm2!!! and made possible as an enormous intensity with even annunciator and offers many ranges of application with boundless organization freedom infinitely in connection with differently substrates as e.g. flexible printed circuit boards and ceramics.


Durch Chip On Board Technik kann auch eine optimale Wärmeableitung erreicht werden, welches die Lebensdauer einer LED enorm beeinflusst.

By chip on board technology can be achieved also an optimal heat dissipation, which affects the life span an LED enormously. To the COB LEDs belongs nearly all power LED variants. Zu den COB LEDs gehören fast alle Power LED Varianten.

Luminance ( Photometric Brightness )

The light that we actually see, brightness can be measured as the light leaving a lamp, or the light reflecting from an object's surface. It is measured in footlamberts (English) or candelas/square meter (metric).

Brightness can be used for a variety of purposes, from producing a sense of drama to creating sparkle and glitter elements in a space. The brighter a task is, the easier it is to see and the lower the amount of light that is required. Too little brightness decreases contrast and calls for a higher light level. But if not properly controlled, high brightness can produce levels of glare that either impair or prevent a desired task being performed. Glare can be described as direct or reflected glare, which can then result in discomfort or disability.

Direct glare comes straight from the light source. Reflected glare shows up on the task itself, such as a computer screen. Discomfort glare does not prevent seeing makes it uncomfortable. Disability glare prevents vision--a popular example is holding a glossy magazine at a certain angle; a veiling reflection results, impairing our reading of the page.

Strategies for Reducing Unwanted Glare

Strategies commonly employed to reduce unwanted levels of glare include:

• Indirect lighting that throws more light upward than downward, diffusing the light and reducing glare on computer screens
• Parabolic louvers, special lenses or other diffusing media on fixtures that diffuse the fixture's light output
• In an office, it may be possible to de-emphasize the ambient lighting system with reduced light output and diffusing media, while providing adjustable task fixtures at workstations
• Relocating the light source
• Relocating the task or changing its orientation until the glare is removed
• Changing the surface reflectance of the task
• Use blinds or shades on windows to control the amount or transmittance angle of sunlight entering the space

Visual Comfort Probability

Visual comfort probability (VCP) is a rating on a scale of 0-100 given to indoor fixtures (in a uniform system with identical fixtures) to indicate how well accepted they are likely to be by the area's occupants. A VCP rating of 75, for example, indicates that 75% of the occupants in the poorest location would not be bothered by direct glare. Generally, office environments require that fixtures have a VCP rating of 70 or more, although this figure has been revised by some in recent years to 80 or more for environments where visual-task computers are used. The VCP rating for a given fixture can be found in its photometric test report. Generally, again, the higher the VCP rating, the lower the fixture's efficiency at transmitting light to the task.


Shielding Media Characteristics for Fluorescent 2x4 Recessed Troffer Fixtures:

Shielding Medium	Fixture Efficiency	VCP Rating
Clear Prismatic Lens	60-75%	50-70
Low-Glare Clear Lens	60-75%	75-85
Deep-Cell Parabolic Louver	50-70%	75-95
Translucent Diffuser	40-60%	40-50
Small-Cell Parabolic Louver	35-45%	99

Brightness Ratios

Brightness ratios in a space can affect how it is perceived. While high ratios of bright to dark in the space can produce contrast or a sense of drama, it can also be visually fatiguing during transient adaptation, which describes the eye adapting to changes in brightness. This can reduce productivity and can even be hazardous. The right approach is determined by the application; the IESNA has recommended brightness ratios for a wide range of environments.

Uniformity

Uniform light and brightness levels across a space can be desirable but may also be boring; in such cases, sparkle elements, color and/or other methods can be employed to create visual interest without causing fatigue.

Color Temperature (K) & Color Rendering (CRI)

What is Color Rendering Index (CRI)?
Color rendering describes how a light source makes the color of an object appear to human eyes and how well subtle variations in color shades are revealed. The Color Rendering Index (CRI) is a scale from 0 to 100 percent indicating how accurate a "given" light source is at rendering color when compared to a "reference" light source.
The higher the CRI, the better the color rendering ability. Light sources with a CRI of 85 to 90 are considered good at color rendering. Light sources with a CRI of 90 or higher are excellent at color rendering and should be used for tasks requiring the most accurate color discrimination.
It is important to note that CRI is independent of color temperature (see discussion of color temperature). Examples: A 2700K ("warm") color temperature incandescent light source has a CRI of 100. One 5000K ("daylight") color temperature fluorescent light source has a CRI of 75 and another with the same color temperature has a CRI of 90.
To further understand the physics of color rendering, we need to look at spectral power distribution.

The visible part of the electromagnetic spectrum is composed of radiation with wavelengths from approximately 400 to 750 nanometers. The blue part of the visible spectrum is the shorter wavelength and the red part is the longer wavelength with all color gradations in between.

Spectral power distribution graphs show the relative power of wavelengths across the visible spectrum for a given light source. These graphs also reveal the ability of a light source to render all, or, selected colors.
Below see how a typical spectral power distribution graph for daylight.

Notice the strong presence (high relative power) of ALL wavelengths (or the "full color spectrum"). Daylight provides the highest level of color rendering across the spectrum.
Compare the daylight spectral power distribution with that for a particular fluorescent lamp.

The most obvious difference is the generally lower level of relative power compared to daylight - - except for a few spikes. All wavelengths (the "full spectrum) are again present but only certain wavelengths (the spikes) are strongly present. These spikes indicate which parts of the color spectrum will be emphasized in the rendering of color for objects illuminated by the light source. This lamp has a 3000K color temperature and a CRI of 82. It produces a light that is perceived as "warmer" than daylight (3000K vs. 5000K). It's ability to render color across the spectrum is not bad, but certainly much worse than daylight. Notice the deep troughs where the curve almost reaches zero relative power at certain wavelengths.
Here is another fluorescent lamp.

This spectral power distribution looks generally similar to the one above except it shows more power at the blue end of the spectrum and less at the red end. Also, there are no low points in the curve that come close to zero power. This lamp has a 5000K color temperature and a CRI of 98. It produces light that is perceived as bluish white (similar to daylight) and it does an excellent job of rendering colors across the spectrum.
Above are links to linear and compact fluorescent light bulbs from Topbulb that have a CRI of 90 or higher. If you want a high color rendering bulb to produce light perceived as warm white, choose a bulb with a color temperature of 3000K or 3500K. If you want a high color rendering bulb to produce light perceived as white, choose a bulb with a color temperature of 4000K. For a bulb that simulates daylight, choose a color temperature of 5000K or higher.
Note: all incandescent and halogen light bulbs, by definition, have a CRI close to 100. They are excellent at rendering color. However, except for some halogen bulbs, most incandescents produce a warm 2800K color temperature. The only way to achieve the bluish white appearance of daylight with incandescent bulbs is to use bulbs coated with neodymium. However, these bulbs have a CRI much lower than 90. They are not good for accurate color rendering across the spectrum.

Dimmable COB LED Downlight Round Swivel

• Light Source: LED surface light source,COB (Chip-on-Board) design
• Body Material: Aluminum.
• Radiator Temp:< 55 degree.
• Radiator Caft : 6063 aluminum cold forging.
• Environment-friendly and no UV or IR radiation.
• No dazzling and mild color with light bending effect.
• Long lifespan, low cost of maintenance.
• Transformer is at the COB LED Downlight directly attached, including a terminal block for power line .
• Easy to install and maintain, and normal base type E can be matched.
• Easy to install and maintain, replacement of traditional bulbs and no subsidiary fixture.
• Available for Switch controll (dimmable) or Non dimmable types.
• Swivel range : 30 °

COB LED Downligh Speciality : Compatible with most SCR dimmer,integration of controlling several light available,no flicker

COB Dimmable LED Downlight Round Swivel ( option of dimmable or not-dimmable )
Nominal voltage(product)	Ac85 - 265V
Operating frequency	50 - 60 Hz
Lifespan	30,000 H
Radiator temp :	< 55°C
Power factor :	> 0.9
Casing material	Radiator temp : 6063 aluminum cold forging Body material:aluminum
Style No#	AL-CCL03	AL-CCL05
Wattage	3w	5w
Luminous flux	Warm white : > 180 Lm Cool white : > 210 Lm Nature white : > 240 Lm	Warm white : > 300 Lm Cool white : > 350 Lm Nature white : > 400 Lm
Luminous efficacy	Warm white : 60 Lm/w Cool white : 70 Lm/w Nature white : 80 Lm/w
Color temperature	Warm white : 3000 K Cool white : 4000 K Nature white : 6400 K
Color rendering index Ra	Warm white : > 80 Ra Cool white : > 75 Ra Nature white : > 75 Ra
Light color	Warm white Cool white Nature white
Dimensions :	Depth :66.5 mm Outer diameter : Φ: 85 mm Diameter : Φ: 75 mm
COB LED Downlight Round Swivel Dimensions images
Packging unit	Contains 50 Piece
Dimensions in H × W × L	210 mm × 480 mm × 480 mm
Gross weight	14.5 Kg
Volume	48.384 Cubic dec

This discreet Downligh ter with minimal design is the ideal solution for the lighting requirements of hotels, retail and fitness areas and spaces that require exact light from compact fittings that are easy to install and maintain.
Available in two versions - fixed and adjustable - Pinhole can be installed in false ceilings with thickness from 1 to 20 mm with stainless steel springs. The front ring contains an accessory-holding ring.

Dimmable LED downlights are used widely for general ambient lighting in:

Home /office lighting,display case lighting
Under cabinet lighting
Art lighting

COB Dimmable LED Downlight

• Light Source: LED surface light source,COB (Chip-on-Board) design
• Body Material: Aluminum.
• Radiator Temp:< 55 degree.
• Radiator Caft : 6063 aluminum cold forging.
• Environment-friendly and no UV or IR radiation.
• No dazzling and mild color with light bending effect.
• Long lifespan, low cost of maintenance.
• Transformer is at the COB LED Downlight directly attached, including a terminal block for power line .
• Easy to install and maintain, and normal base type E can be matched.
• Easy to install and maintain, replacement of traditional bulbs and no subsidiary fixture.
• Available for Switch controll (dimmable) or Non dimmable types.
• Swivel range : 30 °

COB LED Downlight Speciality : Compatible with most SCR dimmer,integration of controlling several light available,no flicker

COB Dimmable LED Downlight ( option of dimmable or not-dimmable )
Nominal voltage(product)	Ac85 - 265V
Operating frequency	50 - 60 Hz
Lifespan	30,000 H
Radiator temp :	< 55°C
Power factor :	> 0.9
Casing material	Radiator temp : 6063 aluminum cold forging Body material:aluminum
Style No#	AL-CD03	AL-CD05	AL-CD07	AL-CD10	AL-CD15
Wattage	3w	5w	7w	10w	15w
Luminous flux	Warm white : > 180 Lm Cool white : > 210 Lm Nature white : > 240 Lm	Warm white : > 300 Lm Cool white : > 350 Lm Nature white : > 400 Lm	Warm white : > 420 Lm Cool white : > 490 Lm Nature white : > 560 Lm	Warm white : > 600 Lm Cool white : > 700 Lm Nature white : > 800 Lm	Warm white : > 900 Lm Cool white : > 1050 Lm Nature white : > 1200 Lm
Luminous efficacy	Warm white : 60 Lm/w Cool white : 70 Lm/w Nature white : 80 Lm/w
Color temperature	Warm white : 3000 K Cool white : 4000 K Nature white : 6400 K
Color rendering index Ra	Warm white : > 80 Ra Cool white : > 75 Ra Nature white : > 75 Ra
Light color	Warm white Cool white Nature white
Dimensions :	Depth :90 mm Outer diameter : Φ: 101.5 mm Diameter : Φ: 75 mm	Depth :102.5 mm Outer diameter : Φ: 112 mm diameter : Φ: 85 mm	Depth :102.5 mm Outer diameter : Φ: 112 mm diameter : Φ: 85 mm	Depth :110 mm Outer diameter : Φ: 143 mm diameter : Φ: 105 mm	Depth :110 mm Outer diameter : Φ: 143 mm diameter : Φ: 105 mm
Dimensions images ( 3w 5w )		Dimensions images ( 5w 7w )		Dimensions images ( 10w 15w )
Packging unit	Contains 16 Piece
Dimensions in H × W × L	280 mm × 320 mm × 620 mm
Gross weight	6.72 Kg
Volume	55.552 Cubic dec

This discreet Downligh ter with minimal design is the ideal solution for the lighting requirements of hotels, retail and fitness areas and spaces that require exact light from compact fittings that are easy to install and maintain.
Available in two versions - fixed and adjustable - Pinhole can be installed in false ceilings with thickness from 1 to 20 mm with stainless steel springs. The front ring contains an accessory-holding ring.

Dimmable LED downlights are used widely for general ambient lighting in:

Home /office lighting,display case lighting
Under cabinet lighting
Art lighting

LED DownLight Manufacturers COB Technology - Features & benefits

• Environment Friendly : LED backlighting eliminates the traces of mercury found in cold-cathode fluorescent lamps, thus meeting mandates for the reduction of hazardous substances. RoHS compliant product, No Cadmium, Lead, or Mercury. Unlike fluorescent, there are no concerns over disposal.
• High Energy Efficient: Only 20% power consumption of halogen lamp and incandescent lamp.
• Low Heat Generation : Excellent heat dissipation design,surface temperature is lower 58°C, Junction temperature lower than 102°C.
• Natural Light : Superior colour rendering over other LED sources due to unique PLF technology; High pupil lumen factor.
• Ergonomic Light : No EMI, ballast noise, UV or glare. Non-flickering light reduces eye strain, headaches and other workplace complaints associated with fluorescent lighting. Remote controlled dimming and (on E models only) colour temperature adjustment to suit changing activities and moods.
• High Uniformity : The backlight unit demonstrates a brightness uniformity of more than 85 percent and a color uniformity (Δu'v') of less than 0.007 in CIE1976 LUV color space. The results are equivalent to the performance of a compact fluorescent light source.

Dimmable COB LED Downlight

• Wattage : 3W / 5W / 7W / 10W / 15W
• Color temperature : 3000K / 4000K / 6400K
• Luminous flux(3W) : 180LM / 210LM / 240LM
• Luminous flux(5W) : 300LM / 350LM / 400LM
• Luminous flux(7W) : 420LM / 490LM / 560LM
• Luminous flux(10W) : 600LM / 700LM / 800LM
• Luminous flux(15W) : 900LM / 1050LM / 1200LM
• Round COB LED Downlight : Available for switch controll (dimmable) or Non dimmable types.

COB LED Downlight Round Swivel

• Swivel range: 30 °
• Wattage : 3W / 5W
• Color temperature : 3000K / 4000K / 6400K
• Luminous flux(3W) : 180LM / 210LM / 240LM
• Luminous flux(5W) : 300LM / 350LM / 400LM
• Round Swivel COB LED Downlight : Available for switch controll (dimmable) or Non dimmable types.

COB LED Downlight Rotatable LED Ceiling Lamp

• Swivel range: 30 °
• Wattage : 3 × 3W / 3 × 5W
• Color temperature : 3000K / 4000K / 6400K
• Luminous flux(3W) : 540LM / 630LM / 720LM
• Luminous flux(5W) : 900LM / 1050LM / 1200LM
• Dimmable COB LED Downlight Rotatable LED Ceiling Lamp : Available for switch controll (dimmable) or Non dimmable types.

(Chip-on-Board) MR16 COB LED Spotlight 3W

• Light Source: LED surface light source,COB (Chip-on-Board) design
• Body Material: Aluminum.
• Radiator Temp:< 50 degree.
• Radiator Caft : Die-casting aluminum case - toughened glass lens
• Environment-friendly and no UV or IR radiation.
• No dazzling and mild color with light bending effect.
• Long lifespan, low cost of maintenance.
• Transformer is at the COB LED Spotlight directly attached, including a terminal block for power line .
• Easy to install and maintain, and normal base type E can be matched.
• Easy to install and maintain, replacement of traditional bulbs and no subsidiary fixture.

COB LED Spotlight : Excellent durability and stanbility at high temperature.

( Chip-on-Board ) COB MR16 LED Spotlight 3W
wattage	3 w
Base type	mr16
Base angle	120 degree
Nominal voltage(product)	Ac110 - 260V
Operating frequency	47 - 63 Hz
Lifespan	30,000 H
Radiator temp :	< 50°C
Power factor :	> 0.9
Casing material	6063 aluminum cold forging
Style No#	AL-SPTV-MR16-3W
Luminous flux	( 3,000 K ) 180 Lm ( 4,000 K ) 210Lm ( 6,400 K ) 240LM
Luminous efficacy	( 3,000 K ) 60Lm/W ( 4,000 K ) 70Lm/W ( 6,400 K ) 80LM/W
Color temperature	Warm white : 3000 K Nature white : 4000 K Daylight white : 6400 K
Color rendering index Ra	(3,000K) > 80 Ra (4,000K) > 75 Ra (6,400K) > 75 Ra
Light color	Warm white Nature white Daylight white
Dimensions : Φ: × H:	Φ 50mm: × H: 61.9mm
Dimensions images:
Packging unit	Contains 100 Piece
Dimensions in H × W × L	210mm × 280mm × 570mm
Gross weight	11.8 Kg
Volume	33.516 Cubic dec

This discreet MR16 COB LED Spotlight with minimal design is the ideal solution for the lighting requirements of hotels, retail and fitness areas and spaces that require exact light from compact fittings that are easy to install and maintain.

COB LED Spotlight MR16 are used widely for general ambient lighting in:

Replacement bulbs for traditional halogen lamps, especially for museums, art galleries, cosmetic,where UV or IR radiation is undesirable.
Suitable for products range of hotel, bar, SPA, hardware store, lighting store, exhibition booth,supermarket, electronic store, show room, and internet shop.

LED Spotlight Manufacturers (Chip On Board) COB LEDs Technology

(Chip On Board) COB Technology provides the greatest benefits for producing homogeneous light effects and high luminous densities.

No UV or IR in the spectrum.

No Dazzling and mild color with light bending effect.

Energy-saving, Environment friendly, and only 20% power consumption of halogen lamp and incandescent lamp.

Aluminum-alloy lamp housing for superior heat dissipation.

Particularly designed constant current driver for open or short circuit protection.

LED Spotlight using a surface light emitting Chip On Board (COB) LEDs .

COB LED Spotlight MR16 3W

• Nominal Wattage : 3 W
• Radiator Temp: < 50 °C
• Dimensions: L: 62 mm × Φ: 50 mm
• Luminous Flux : 180LM / 210LM / 240LM
• Color Temperature : 3000K / 4000K / 6400K
• LED Spotlight Using A Surface Light Emitting ( Chip On Board ) COB LEDs

COB LED Spotlight GU10 3W

• Nominal Wattage : 3 W
• Radiator Temp: < 50 °C
• Dimensions: L: 70 mm × Φ: 50 mm
• Luminous Flux : 180LM / 210LM / 240LM
• Color Temperature : 3000K / 4000K / 6400K
• LED Spotlight Using A Surface Light Emitting ( Chip On Board ) COB LEDs

COB LED Spotlight E14 3W

• Nominal Wattage : 3 W
• Radiator Temp: < 50 °C
• Dimensions: L: 86 mm × Φ: 50 mm
• Luminous Flux : 180LM / 210LM / 240LM
• Color Temperature : 3000K / 4000K / 6400K
• LED Spotlight Using A Surface Light Emitting ( Chip On Board ) COB LEDs

LED Light Guide Formulas

Demand for Power (kW) =System Input Wattage (W) ÷ 1,000
Energy Consumption (kWh) = System Input Wattage (kW) x Hours of Operation/Year
Hours of Operation/Year = Operating Hours/Day x Operating Days/Week x Operating Weeks/Year
Lighting System Efficacy (Lumens per Watt or LPW) = System Lumen Output ÷ Input Wattage
Unit Power Density (W/sq.ft.) = Total System Input Wattage (W) ÷ Total Area (Square Feet)
Watts (W) = Volts (V) x Current in Amperes (A) x Power Factor (PF)
Voltage (V) = Current in Amperes (A) x Impedance (Ohms) [Ohm's Law]

ECONOMIC FORMULAS
Simple Payback on an Investment (Years) = Net Installation Cost ($) ÷ Annual Energy Savings ($)
5-Year Cash Flow ($) = 5 Years - Payback (Years) x Annual Energy Savings ($)
Simple Return on Investment (%) = [Annual Energy Savings ($) ÷ Net Installation Cost ($)] x 100

DESIGN FORMULAS
Footcandles & Lumens
Footcandles (fc) = Total Lumens (lm) ÷ Area in Square Feet
1 Lux (lx) = 1 Footcandle (fc) x 10.76
Lux = Total Lumens ÷ Area in Square Meters

Calculating Light Level at a Point
For planes perpendicular to the direction of candlepower (Inverse Square Law):
Footcandles (fc) = I ÷ D²

I = Candlepower in candelas (cd) D = Direct distance between the lamp and the point where light level is calculated

Many workplanes are not perpendicular to the direction of light intensity, which is why calculating light level at a point is useful for such applications. In these cases, we often must determine light levels on workplanes that are not horizontal and perpendicular but tilted or even vertical. For tilted-horizontal or vertical planes:
Horizontal Footcandles (fc_h) = (I ÷ D²) x H
Vertical Footcandles (fc_v) = (I ÷ D²) x L

I = Candlepower in candelas (cd) D = Direct distance between the lamp and the point where light level is calculated
H = Distance between the lamp and the point direct below on the workplane
L = Distance between that point and the point where light level is being calculated
D = Square Root of (H² + L²) or D² = H² + L²

Calculating Average Light Level Throughout a Space (three formulas)

Average Maintained Illumination (Footcandles) = (Lamps/Fixture x Lumens/Lamp x No. of Fixtures x Coefficient of Utilization x Light Loss Factor) ÷ Area in Square Feet Average Maintained Illumination (Footcandles) = (Total Lamps x Lumens/Lamp x Coefficient of Utilization x Light Loss Factor) ÷ Area in Square Feet
Average Maintained Illumination (Footcandles) = (Lamps in One Fixture x Lumens/Lamp x Coefficient of Utilization x Light Loss Factor) ÷ Area in Square Feet/Fixture

Lumen Method
Required Light Output/Fixture (Lumens) = (Maintained Illumination in Footcandles x Area in Square Feet) ÷ (Number of Fixtures x Coefficient of Utilization x Ballast Factor x Light Loss Factor)

Light Loss Factors (more on Light Loss)
Light Loss Factor (LLF) = Ballast Factor x Fixture Ambient Temperature Factor x Supply Voltage Variation Factor x Lamp Position Factor x Optical Factor x Fixture Surface Depreciation Factor x Lamp Burnouts Factor x Lamp Lumen Depreciation Factor x Fixture Dirt Depreciation Factor x Room Surface Dirt Depreciation Factor
Lamp Burnout Factor = 1 - Percentage of Lamps Allowed to Fail Without Being Replaced

Zonal Cavity Method (determining cavity ratios)

Room Cavity Ratio (for regular rooms shaped like a square or rectangle) = [5 x Room Cavity Depth x (Room Length + Room Width)] ÷ (Room Length x Room Width) Room Cavity Ratio (for irregular-shaped rooms) = (2.5 x Room Cavity Depth x Perimeter) ÷ Area in Square Feet
Ceiling Cavity Ratio = [5 x Ceiling Cavity Depth x (Room Length x Room Width)] ÷ (Room Length x Room Width)
Floor Cavity Ratio = [5 x Floor Cavity Depth x (Room Length x Room Width)] ÷ Room Length x Room Width

Room surface reflectances can be predicted in a new design or measured in an existing facility. If existing facility:

Room Surface Reflectance (%) = Reflected Reading ÷ Incident Reading Reflected Reading = Measurement from a light meter holding it about 1.5 feet away from the surface with the sensor parallel and facing the surface.
Incident Reading = Measurement from a light meter held flat against the surface and facing out into the room.

Calculating Number of Lamps And Fixtures And Spacing
Required No. of Fixtures = (Lumens/Lamp x No. of Lamps x Coefficient of Utilization x Light Loss Factor x Area in Square Feet) ÷ (Lumens/Lamp x Lamps/Fixture x Coefficient of Utilization x Light Loss Factor)
Required Lamps = Required Lumens ÷ Initial Lumens/Lamp
Maximum Allowable Spacing Between Fixtures= Fixture Spacing Criteria x Mounting Height

Fixture Spacing Criteria: See the manufacturer's literature Mounting height: Distance in feet between the bottom of the fixture and the workplane

Spacing Between Fixtures = Square Root of (Area in Square Feet ÷ Required No. of Fixtures)
Number of Fixtures to be Placed in Each Row (N_row) = Room Length ÷ Spacing
Number of Fixtures to be Placed in Each Column (N_column) = Room Width ÷ Spacing

For the above two formulas, round results to the nearest whole integer.

Spacingrow = Room Length ÷ (Number of Fixtures/Row - 1/3)
Spacingcolumn = Room Width ÷ (Number of Fixtures/Column -1/3)

If the resulting number of fixtures does not equal the originally calculated number, calculate impact on the designed light level:
% Design Light Level = Actual No. of Fixtures ÷ Originally Calculated No. of Fixtures

To calculate fixtures mounted in continuous rows:
Number of Luminaires in a Continuous Row = (Room Length ÷ Fixture Length) - 1
Number of Continuous Rows = Total Number of Fixtures ÷ Fixtures Per Row

MAINTENANCE
Lamp Life
Calendar Lamp Life (Years) = Rated Lamp Life (Hours) ÷ Annual Hours of Operation (Hours/Year)

Lamp Burnout Factor
Lamp Burnout Factor = 1 - Percentage of Lamps Allowed to Fail Without Being Replaced

Group Relamping Cost
Annualized Cost ($) = A x (B + C)
A = Operating Hours/Year ÷ Operating Hours Between Relampings
B = (Percentage of Lamps Failing Before Group Relamping x Number of Lamps) x (Lamp Cost + Labor Cost to Spot Replace 1 Lamp)
C = (Lamp Cost, Group Relamping + Labor Cost to Group Relamp 1 Lamp) x Number of Lamps

Spot Relamping Cost
Average Annual Cost ($) = (Operating Hours/Year ÷ Rated Lamp Life) x (Lamp Cost + Labor Cost to Replace 1 Lamp) x Total Number of Lamps

Cleaning Cost
Cleaning Cost ($) = Time to Wash 1 Fixture (Hours) x Hourly Labor Rate ($) x Number of Fixtures in Lighted Space

ENVIRONMENTAL IMPACT
Average Reduced Air Pollution (lbs. Carbon Dioxide) = Energy Savings (kWh) x 1.6 lbs.
Average Reduced Air Pollution (g. Sulphur Dioxide) = Energy Savings (kWh) x 5.3 g.
Average Reduced Air Pollution (g. Nitrogen Oxides) = Energy Savings (kWh) x 2.8 g.
Pounds = Grams ÷ 454
Tons = Pounds ÷ 2,000

Fitting Downlights

Once you have decided that you wish to install Downlighters in your room it is important for you to decide several things:

Question

• 1. How many Downlights do I want? Or need?
• 2. Should the Downlights be 12v or 230v?
• 3. Do the Downlights need to be fire rated, acoustic rated or IP rated?
• 4. Can I do the work myself or should I get an electrician in?
• 5. What is the best process from start to finish for actually fitting the Downlights?
• 6. Do I need any special tools?
• 7. Can the existing lighting circuit support the extra light fittings?

Question: How many Downlights do I want? Or need?

Answer

This very much comes down to personal preference. Personally I prefer to fit more than is required, and then divide then up onto different switches. This will create different lighting effects. For example if you are putting the downlights into a kitchen you could have the downlights that are placed over the worktops on one switch and the other downlights that are illuminating the rest of the kitchen on another switch possibly a dimmer. This then means that you have good task lighting where needed and controllable mood lighting elsewhere.

However there are still some important factors to remember.

Without having any technical information about your particular room, use the following "Rule of Thumb". This best describes a kitchen, but can be adjusted for any room in your house.

Firstly make sure the Downlights that are going to be closest to your walls are no more than 600mm into the room. The reason for this is that 600mm is the standard measurement for the depth of your floor cupboards. This will mean that once the Downlights are fitted, no shadows will be created over the area that you are working.

You should now work out the position of the other lights by spacing them at intervals of between 900mm and 1200mm. From these figures you should now be able to calculate how many fitting will be in a row and how many rows you will need.

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Question: Should the Downlights be 12v or 230v?

Answer

This has been a long standing debate with no particular winner. I hope the below information helps.

Low voltage (LV or 12v) downlights are wired to a transformer, which is then wired to the mains supply. Although the transformer wastes approximately 10% of the power through stepping down the voltage to 12v this is more than compensated by the improved performance of low voltage downlights.

Due to a thicker filament, the halogen 12v bulbs (size MR16) are more efficient than the halogen 230v (size GU10) equivalent. The thicker filament also means that the bulbs are more robust.

Another advantage of 12v is that low voltage bulbs use halogen gas, which provides a much whiter and brighter light with higher clarity than the more traditional mains voltage incandescent bulbs.

Mains voltage downlights are wired directly to the mains without the need for a transformer.

The mains voltage (230v) downlights are generally cheaper, and can be simpler to install, as there is no need to install a transformer.

As an electrician I would advise my customers to use 12v Downlights in Kitchens and bathrooms where you generally need more light, but can be reduced using low wattage bulbs or dimmer switches if needed. The use of 230v Downlights in other areas would then be perfectly acceptable.

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Question: Do the Downlights need to be fire rated, acoustic rated or IP Rated?

Answer

Ceilings provide an important barrier that helps to prevent the spread of fire and noise between the floors of a building. Installing recessed downlights punctures this barrier and can reduce the effectiveness of this safety barrier.

Installing fire rated downlights helps to protect your premises from the effects of both fire and noise pollution and aids compliance with new building regulations governing the installation of downlights. Made from intumescent materials, fire rated downlights seal the gap between the ceiling and the fitting to offer up to 90 minutes protection against the spread of fire into the void spaces within your ceiling / loft space.

Fire rated downlights are more expensive than non-fire rated downlights. However, the worst decision you can make is to buy cheaper models that look exactly the same only to find out from the electrician fitting them, that building regulations require fire rated downlights for that situation. Then fire hoods will have to be bought and you would now find that you have spent more money in the long run.

Personally I feel it is best to always go for the safest lights on the market. Fires cost lives, surely that is worth a few pence more to fit fire rated downlights.

Having the right IP rated downlights is also a very important factor. Please see "What is IP Zoning" to see whether you will need an IP rated downlight. Water and electricity do not mix. Again IP rated downlights cost a fraction more but by paying a little extra you could save yourself from being electrocuted, or causing the contacts in the fitting to corrode. This could lead to a short circuit and possibly a fire.

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Question: Can I do the work myself or should I get an electrician in?

Answer

Firstly you should read " Part P - What is it? " as this will answer whether or not you can legally carry out the work you wish to do. Some people will always have a go, no matter what their level of competence is.

Electricity is dangerous and could kill you. I will always suggest to get an electrician in to do the work required, but if you are determined to do some electrics yourself please remember to be safe at all times and follow some basic safe isolation procedures before proceeding:

• Locate / positively identify correct isolation point or device
• Check condition of voltage indication device
• Confirm that voltage indication device is functioning correctly
• Switch off installation / circuit to be isolated
• Verify with voltage indicating device that no voltage is present
• Re-confirm that voltage indicating device functions correctly on known supply / proving unit
• Lock-off or otherwise secure device used to isolate installation / circuit
• Post warning notice(s)

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Question: What is the best process from start to finish for actually fitting the Downlights?

Answer

• Decide where you wish to place your chosen downlights measuring out the ceiling and marking the central point of the light. Now drill a small pilot hole through the ceiling.
• Now you have marked out the positions of the downlights it is a good idea to check above the ceiling to ensure that there are no joists / wires / pipes in the way. You should be able to see a small pinprick of light coming through the ceiling where you drilled the pilot holes. If you are unable to view the ceiling from above it gets trickier. The best way is to determine which way the joists run and what the spacing of them are. You could then use an old wire coat hanger bent at a 90⁰ angle to the width of the downlight. Insert the wire through the hole until the 90⁰ bend is through. Now twist the wire a full 360⁰ and hopefully it will not bump into any obstructions.
• In the instructions or on the box of the downlights it will say what the cut-out for that downlight will be. For the best results I will generally use a hole saw (a type of drill bit) to the correct size of the downlight which can be purchased very cheaply from most DIY stores. Alternatively the use of a plasterboard saw (Pad Saw) can be used which eliminates the need for a drill and hole saw. For this method you will need to draw a circle on the ceiling to the correct size as a guide for when you start to saw.
• Hopefully now you have produced a clean cut hole in the ceiling, got the plaster out of your eyes and shaken yourself outside to stop you looking like Casper the ghost!
• Once the wiring has been pulled through the hole the downlight can be wired. To fit the downlight into the hole hold the two springs back against the sides of the downlighter and push up into the hole. The springs then lie flat on the top of the ceiling holding it in place

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Question: Do I need any special tools?

Answer

This all depends on what you have in your tool box already! Please see the below list of what tools I have used in the past for fitting downlights. Some of them you might not need but can often prove useful.

• Chalk line
• Tape measure
• Pencil
• Pad saw
• Hand drill
• Hole saw (type of drill bit)
• Small drill bit for pilot hole
• Screw drivers

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Question: Can the existing lighting circuit support the extra light fittings?

Answer

Lighting circuits are usually on 6 amp circuit breakers often know as MCB’s (Miniature Circuit Breakers). To calculate how many Amps are loaded onto the lighting circuit a simple calculation is made. UK voltage is 230 volts, now assume that each light on the circuit is 100 watts, and you have got 12 lights on the circuit.

The calculation would be:

Total Watts ÷ Voltage = Amps

So taking the above information the calculation would be:

1200 watts ÷ 230 volts = 5.22 amps

So now we can see that the above described lighting circuit is using 5.22 amps meaning that the circuit breaker of 6 amps is not being overloaded.

Now to confuse things a little but very helpful on lighting circuits when you are wishing to add more lights. On lighting circuits once you have worked out the amps you can now apply a thing called Diversity, which for lighting circuits is 66% of the total load. So to work out this calculation we can do the following sum:

5.22amps ÷ 100 × 66 = 3.45 amps

So now we can see that we are able to add more lights to the circuit now that diversity has been applied to it.

Remember to carry out your calculations before you start any work!

Calculate Number of LEDs Needed

Actual Lumens Needed

With all the system efficiencies estimated, the actual number of LED lumens required to achieve the design goals can be calculated. For this calculation, only the light efficiencies (optical and thermal) are used. The electrical efficiency affects only the total power consumed and fixture efficacy, not the amount of light coming out of the luminaire. The calculation of ¡°actual lumens needed¡± for the example luminaire is shown below:

Actual Lumens Needed = Target Lumens / (Optical Efficiency x Thermal Efficiency)

Operating Current

Another decision to be made is what operating current to use for the LEDs. Operating current plays an important role in determining the efficacy and lifetime of the LED luminaire. Increasing the operating current will result in more light output from each LED, thus reducing the number of LEDs needed. However, increasing operating current also has several drawbacks. Depending on the application, these drawbacks may be acceptable trade-offs for the higher per-LED lumen output.

For the example luminaire, lifetime and efficacy are top priority design goals. The luminaire will run at the minimum operating current listed on the XLamp XR-E datasheet (350 mA) to maximize LED efficacy and lifetime.

1. Reduced efficacy

Higher operating current reduces the efficacy of current generation power LEDs. In general, the size of the power supply will increase as operating current increases, since it takes more power to generate the same number of lumens.

2. Reduced maximum ambient temperature OR Decreased lifetime

Higher current will increase the temperature difference between the LED junction and the LEDs thermal path. In practical terms, since the maximum junction temperature is already decided, this reduces the maximum ambient temperature for the luminaire.

If instead of lowered maximum ambient temperature, the maximum junction temperature is raised, the LED will degrade in light output faster over its operational life.

Number of LEDs

After deciding on operating current, the lumen output of each LED can be calculated. Since the thermal loss of the LED has already been taken into account through the actual-lumens-needed calculation, the numbers specified in LED-supplier documentation can be used directly without further interpretation.

For this calculation, it is important to use the minimum flux listed for your LED order code and not the typical number on the data sheet. Most LED companies sell to minimum flux ranges. By designing against this minimum number, you are ensuring that all luminaires made with that LED order code meet the target requirements.

Number of LEDs = Actual Lumens Needed / Lumens per LED .

Dimmable LED Light Bulb PY

• The "Dimmable LED Light Bulb PY" generates bright light measured at 600.8 lumens, while emitting no UV radiation (unlike CFLs) and virtually no heat (unlike both CFLs and incandescent bulbs).
• The "Dimmable LED Light Bulb PY" emits warm white light, corresponding to the Correlated Color Temperature (CCT) of 2,200 - 3,000K.
• Color Rendering Index (CRI) is the ability of a light bulb to show the colors of objects accurately on a scale of 1-100. The "Dimmable LED Light Bulb PY" CRI is >87.
• Unlike most CFLs that flicker and generate only partial light output for several seconds after being turned on, The "Dimmable LED Light Bulb PY" turns on instantly.

The perfect energy-efficient, eco-friendly and safe replacement Dimmable LED Light Bulb for indoor task and accent lighting.

Dimmable LED Light Bulb PY 8W
Item	Dimmable LED Light Bulb PY 8W
Style No#	AL-CPY-8W
Base(standard designation)	E27 / E26
Wattage	8w
Luminous efficacy	Cool white : > 72.39 Lm/w
Luminous flux	Cool white : > 600.8 Lm
Color temperature	Cool white : 2,200 K - 3,000 K
Color rendering index Ra	> 87 Ra
Casing material	PC + Airlines Die - Cast aluminum
Light color	Cool white
Nominal voltage(product)	Ac90 - 265V
Operating frequency	50 - 60 Hz
Dimensions: L × Φ	L: 107 mm × Φ: 70 mm
Lifespan	3,5000 H
Packging unit	Contains 100 Piece
Dimensions in H × W × L	335mm × 335mm × 500mm
Gross weight	12.5 Kg
Volume	56.1125 Cubic dec

Dimmable LED Bulb Manufacturers COB Technology - Features & benefits

• Smooth dimming 10% - 100%
• Warm, pleasant white light.
• Energy-efficient and eco-friendly.
• Lasts 25 times longer than incandescent bulbs
• Contains no mercury or lead.
• Emits no harmful UV radiation.
• Generates virtually no heat
• Turns on instantly, without flickering.

The perfect energy-efficient, eco-friendly and safe replacement LED light bulb for indoor task and accent lighting.

Description Safety Savings Light Quality Specifications The Dimmable led Light bulb casts warm white light, bright enough to be used for replacement of up to 80W compact fluorescent and incandescent light bulbs in directional lighting applications, such as task lights or accent lights to compliment ambient illumination.

Dimmable Bulb LED Light Using A Surface Light Emitting ( Chip On Board ) COB LEDs

Smooth Dimming 10% - 100% COB LED Bulb

• Wattage : 8 W
• Base: E26 / E27
• Luminous flux: 660.8 lm
• Color temperature: 2,200 - 3,000 K
• Dimmable Bulb LED Light : Using A Surface Light Emitting ( Chip On Board ) COB LEDs

COB LED Light Tube T10

• COB LED Light Tube T10 9W 14W 19W 24W
• Up to 80% energy savings.
• Fits conventional fluorescent light fixture.
• Super high efficiency lumen output.
• High-efficient power design (Constant current).
• Simple repair and maintenance with (Chip on board ) LEDs modular design.
• Absolutely no flicker for eye protection
• UV or IR free for skin & eye benefit.
• Lower burden on air-conditioner.
• Instant lighting-on with no flickering.
• Excellent durability and stanbility at high temperature.

LED Light Tube T10 Using A Surface Light Emitting ( Chip On Board ) COB LEDs

COB LED Light Tube T10 9w / 14w / 19w / 24w
Item	COB LED Tube T10 9w	COB LED Tube T10 14w	COB LED Tube T10 19w	COB LED Tube T10 24w
Style No#	AL-T10-9W	AL-T10-14W	AL-T10-19W	AL-T10-24W
Lamp holder / Base	G 13
Wattage	9 w	14 w	19 w	24 w
Luminous flux	Cool white : 650 - 750 Lm	Cool white : 950 - 1050 Lm	Cool white : 1300 - 1400 Lm	Cool white : 1600 - 1700 Lm
	Warm white : 550 - 650 Lm	Warm white : 850 - 950 Lm	Warm white : 1200 - 1300 Lm	Warm white : 1500 - 1600 Lm
Qtp of LED	135	210	285	360
Color temperature	Cool white : 6000 K ± 300 K Warm White : 3000 K ± 300 K
Color rendering index Ra	≥ 75 Ra
Casing material	PC + Airlines Die - Cast aluminum
Power Factor	≥ 90%
Light color	Warm white / Cool white
Nominal voltage(product)	Ac85 - 265V
Operating frequency	50 - 60 Hz
Dimensions: L × Diameter : Φ	L: 588 mm Φ : 30 mm	L: 894 mm Φ : 30 mm	L: 1198 mm Φ : 30 mm	L: 1498 mm Φ : 30 mm
Lifespan	30,000 - 50,000 H
Packging unit	25pc
Dimensions in H × W × L	L : 220 mm × 210 mm × 650 mm	L : 220 mm × 210 mm × 950 mm	L : 220 mm × 210 mm × 1250 mm	L : 220 mm × 210 mm × 1520 mm
Gross weight	8 kg	10.25 kg	14.15 kg	17.55 kg
Volume : L X W X H	30.030 Cubic dec	43.890 Cubic dec	57.750 Cubic dec	70.224 Cubic dec

Application:
Suitable for the offices, schools, basement parkings, restaurants, hotels, hypermarkets and many other places because the COB LED Tube Lamps do not contain poisonous and help with cost-saving and carbon reduction programmes. Available in various lengths and color temperatures, the Welland LED tube lamps come in various lengths and are designed to replace conventional fluorescent tube lamps. The tube lamps are manufactured with reliable plastic tube and high quality (Chip on board ) LEDs module, so are extremely safe and durable.

Attention:
- Please cut off the main power supply before installation.
- The starter, ballast, electrical switch are not required for LED tube.
- To remove the electric switch and reconstruct the circuit by professional electrician is suggested.
- This COB LED tube is not Dimmable - Do not connect with the Dimmer.
- Do not use for Emergency Fittings.

COB LED Light Tube T5 ( 8w / 13w / 18w )

• COB LED Light Tube T5 8W 13W 18W
• Up to 80% energy savings.
• Fits conventional fluorescent light fixture.
• Super high efficiency lumen output.
• High-efficient power design (Constant current).
• Simple repair and maintenance with (Chip on board ) LEDs modular design.
• Absolutely no flicker for eye protection
• UV or IR free for skin & eye benefit.
• Lower burden on air-conditioner.
• Instant lighting-on with no flickering.
• Excellent durability and stanbility at high temperature.

COB LED Light Tube T5 ( 8w / 13w / 18w )
Item	COB LED Tube T5 8W	COB LED Tube T5 13W	COB LED Tube T5 18W
Sype No#	AL-T5-8W	AL-T5-13W	AL-T5-18W
Lamp holder / Base	G 5
Wattage	8 w	13 w	18 w
Luminous flux	Cool white : 450 - 550 Lm	Cool white : 800 - 900 Lm	Cool white : 1100 - 1200 Lm
	Warm white : 350 - 450 Lm	Warm white : 700 - 800 Lm	Warm white : 1000 - 1100 Lm
Color temperature	Cool white : 6000 K ± 300 K Warm White : 3000 K ± 300 K
Color rendering index Ra	≥ 75 Ra
Casing material	PC + Airlines Die - Cast aluminum
Power Factor	≥ 90%
Light color	Warm white / Cool white
Nominal voltage(product)	Ac85 - 265V
Operating frequency	50 - 60 Hz
Dimensions: L × W × H Diameter : Φ	L: 570 mm W : 23 mm H : 36 mm Φ : 16 mm	L: 870 mm W : 23 mm H : 36 mm Φ : 16 mm	L: 1170 mm W : 23 mm H : 36 mm Φ : 16 mm
Lifespan	30,000 - 50,000 H
Packging unit	Contains 25 Piece	Contains 25 Piece	Contains 25 Piece
Dimensions in H × W × L	220 mm × 210mm × 650mm	220 mm × 210mm × 950mm	220 mm × 210mm × 1250mm
Gross weight	5.75 kg	8.65 kg	11.5 kg
Volume	30.030 Cubic dec	43.890 Cubic dec	57.750 Cubic dec

Application:
Suitable for the offices, schools, basement parkings, restaurants, hotels, hypermarkets and many other places because the COB LED Tube Lamps do not contain poisonous and help with cost-saving and carbon reduction programmes. Available in various lengths and color temperatures, the Welland LED tube lamps come in various lengths and are designed to replace conventional fluorescent tube lamps. The tube lamps are manufactured with reliable plastic tube and high quality (Chip on board ) LEDs module, so are extremely safe and durable.

Attention:
- Please cut off the main power supply before installation.
- The starter, ballast, electrical switch are not required for LED tube.
- To remove the electric switch and reconstruct the circuit by professional electrician is suggested.
- This COB LED tube is not Dimmable - Do not connect with the Dimmer.
- Do not use for Emergency Fittings.

COB LED Light Tube T8 9w / 14w / 19w / 24w

• COB LED Light Tube T8 9W 14W 19W 24W
• Up to 80% energy savings.
• Fits conventional fluorescent light fixture.
• Super high efficiency lumen output.
• High-efficient power design (Constant current).
• Simple repair and maintenance with (Chip on board ) LEDs modular design.
• Absolutely no flicker for eye protection
• UV or IR free for skin & eye benefit.
• Lower burden on air-conditioner.
• Instant lighting-on with no flickering.
• Excellent durability and stanbility at high temperature.

COB LED Light Tube T8 9w / 14w / 19w / 24w
Item	COB LED Tube T8 9w	COB LED Tube T8 14w	COB LED Tube T8 19w	COB LED Tube T8 24w
Style No#	AL-T8-9W	AL-T8-14W	AL-T8-19W	AL-T8-24W
Lamp holder / Base	G 13
Wattage	9 w	14 w	19 w	24 w
Luminous flux	Cool white : 550 - 650 Lm	Cool white : 850 - 950 Lm	Cool white : 1200 - 1300 Lm	Cool white : 1500 - 1600 Lm
	Warm white : 450 - 550 Lm	Warm white : 750 - 850 Lm	Warm white : 1100 - 1200 Lm	Warm white : 1400 - 1500 Lm
Qtp of LED	135	210	285	360
Color temperature	Cool white : 6000 K ± 300 K Warm White : 3000 K ± 300 K
Color rendering index Ra	≥ 75 Ra
Casing material	PC + Airlines Die - Cast aluminum
Power Factor	≥ 90%
Light color	Warm white / Cool white
Nominal voltage(product)	Ac85 - 265V
Operating frequency	50 - 60 Hz
Dimensions: L × Diameter : Φ	L: 588 mm Φ : 26 mm	L: 894 mm Φ : 26 mm	L: 1198 mm Φ : 26 mm	L: 1498 mm Φ : 26 mm
Lifespan	30,000 - 50,000 H
Packging unit	25pc
Dimensions in H × W × L	220 mm × 210 mm × 650 mm	220 mm × 210 mm × 950 mm	220 mm × 210 mm × 1250 mm	220 mm × 210 mm × 1520 mm
Gross weight	7.25 kg	9.65 kg	12.6 kg	15.25 kg
Volume : L X W X H	30.030 Cubic dec	43.890 Cubic dec	57.750 Cubic dec	70.224 Cubic dec

Application:
Suitable for the offices, schools, basement parkings, restaurants, hotels, hypermarkets and many other places because the COB LED Tube Lamps do not contain poisonous and help with cost-saving and carbon reduction programmes. Available in various lengths and color temperatures, the Welland LED tube lamps come in various lengths and are designed to replace conventional fluorescent tube lamps. The tube lamps are manufactured with reliable plastic tube and high quality (Chip on board ) LEDs module, so are extremely safe and durable.

Attention:
- Please cut off the main power supply before installation.
- The starter, ballast, electrical switch are not required for LED tube.
- To remove the electric switch and reconstruct the circuit by professional electrician is suggested.
- This COB LED tube is not Dimmable - Do not connect with the Dimmer.
- Do not use for Emergency Fittings.

LED Luminaire Design Process

1. Define Lighting Requirements

The design goals should be based either on an existing fixture¡¯s performance or on the application¡¯s lighting requirements.

2. Define design goals

♠ Specify design goals, which will be based on the application¡¯s lighting requirements.
♠ The designer should specify any other goals that will influence the design, such as special optical requirements or being able to withstand high temperatures.

3. Estimate efficiencies of the optical, thermal & electrical systems

♠ Design goals will place constraints on the optical, thermal and electrical systems.
♠ Good estimations of efficiencies of each system can be made based on these constraints.
♠ The combination of lighting goals and system effiiciencies will drive the number of LEDs needed in the luminaire.

4. Calculate the number of LEDs needed

Based on the design goals and estimated losses, the designer can calculate the number of LEDs needed to meet the design goals.

5. Consider all design possibilities and choose the best

♠ As with any design, there are many different ways to best achieve the design goals.
♠ LED lighting is still a new field, so assumptions that work for conventional lighting sources may not apply to LED lighting design.

6. Complete final steps

Complete circuit board layout.
♠ Test design choices by building a prototype luminaire.
♠ Make sure the design achieves all the design goals.
♠ Use the prototype design to further refine the luminaire design.
♠ Record observations and ideas for improvement.

LED Luminaire Design Guide

Lighting-class LEDs are now available that deliver the brightness, efficacy, lifetime, color temperatures, and white-point stability required for general illumination.

LED-based luminaires reduce total-cost-of-ownership ( TCO ) in these applications through maintenance avoidance ( since LEDs last much longer than traditional lamps ) and reduced energy costs.

There are over 20 billion light fixtures using incandescent, halogen, or fluorescent lamps worldwide. Many of these fixtures are being used for directional light applications but are based on lamps that put out light in all directions. The United States Department of Energy ( DOE ) states that recessed downlights are the most common installed luminaire type in new residential construction . In addition, the DOE reports that downlights using non-reflector lamps are typically only 50% efficient, meaning half the light produced by the lamp is wasted inside the fixture.

In contrast, lighting-class LEDs offer efficient, directional light that lasts at least 50,000 hours. Indoor luminaires designed to take advantage of all the benefits of lighting-class LEDs can: Exceed the efficacy of any incandescent and halogen luminaire Match the performance of even the best CFL ( compact fluorescent ) recessed downlights Provide a lifetime five to fifty times longer than these lamps before requiring maintenance Reduce the environmental impact of light: no mercury, less power-plant pollution, and less landfill waste.

Luminaires Or Lamps

Designing LEDs into general illumination requires a choice between designing either a complete luminaire based on LEDs or an LED-based lamp meant to install into an existing fixture. Generally, a complete luminaire design will have better optical, thermal and electrical performance than the retrofit lamp, since the existing fixture does not constrain the design. It is up to the designer to decide whether the total system performance of a new luminaire or the convenience of a retrofit lamp is more important in the target application.

LED-based Luminaires For The Following Four Characteristics:

1. Luminaire light output ( lumens )
2. Luminaire efficacy ( lumens per watt )
3. Correlated color temperaure ( degrees Kelvin )
4. Color-rendering index
DOEs CPTP sets a good precedent for LED luminaire design by focusing on the usable light output of a luminaire ¡ª not just the light output of the light source.

LED DownLight Manufacturers COB Technology - Features & benefits

• Environment Friendly : LED backlighting eliminates the traces of mercury found in cold-cathode fluorescent lamps, thus meeting mandates for the reduction of hazardous substances. RoHS compliant product, No Cadmium, Lead, or Mercury. Unlike fluorescent, there are no concerns over disposal.
• High Energy Efficient: Only 20% power consumption of halogen lamp and incandescent lamp.
• Low Heat Generation : Excellent heat dissipation design,surface temperature is lower 58°C, Junction temperature lower than 102°C.
• Natural Light : Superior colour rendering over other LED sources due to unique PLF technology; High pupil lumen factor.
• Ergonomic Light : No EMI, ballast noise, UV or glare. Non-flickering light reduces eye strain, headaches and other workplace complaints associated with fluorescent lighting. Remote controlled dimming and (on E models only) colour temperature adjustment to suit changing activities and moods.
• High Uniformity : The backlight unit demonstrates a brightness uniformity of more than 85 percent and a color uniformity (Δu'v') of less than 0.007 in CIE1976 LUV color space. The results are equivalent to the performance of a compact fluorescent light source.

Dimmable COB LED Downlight

• Wattage : 3W / 5W / 7W / 10W / 15W
• Color temperature : 3000K / 4000K / 6400K
• Luminous flux(3W) : 180LM / 210LM / 240LM
• Luminous flux(5W) : 300LM / 350LM / 400LM
• Luminous flux(7W) : 420LM / 490LM / 560LM
• Luminous flux(10W) : 600LM / 700LM / 800LM
• Luminous flux(15W) : 900LM / 1050LM / 1200LM
• Round COB LED Downlight : Available for switch controll (dimmable) or Non dimmable types.

COB LED Downlight Round Swivel

• Swivel range: 30 °
• Wattage : 3W / 5W
• Color temperature : 3000K / 4000K / 6400K
• Luminous flux(3W) : 180LM / 210LM / 240LM
• Luminous flux(5W) : 300LM / 350LM / 400LM
• Round Swivel COB LED Downlight : Available for switch controll (dimmable) or Non dimmable types.

COB LED Downlight Rotatable LED Ceiling Lamp

• Swivel range: 30 °
• Wattage : 3 × 3W / 3 × 5W
• Color temperature : 3000K / 4000K / 6400K
• Luminous flux(3W) : 540LM / 630LM / 720LM
• Luminous flux(5W) : 900LM / 1050LM / 1200LM
• Dimmable COB LED Downlight Rotatable LED Ceiling Lamp : Available for switch controll (dimmable) or Non dimmable types.