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3. Product Technology (Commercial Lighting):

3.1 What LED type you use?
At present, the LED spot light and LED bulb usually uses 1W high power LED;
The LED Tube usually used  SMD3528 & SMD5050, 1W high power LED &  DIP LED are also used for LED Tube.
LED Street Bulb and LED Ceiling Light usually uses 1W High Power LED ;
LED Panel Light usually uses SMD 5050 LED, and it 's use LGP for light Uniform scattering
3.2 Introduce the Products Working Voltage?
The LED Spot Light, LED Street Bulb, LED Tube and LED Ceiling Light, LED Panel Light, in the normal working voltage scope (rated voltage in ±20%), the Light Fixture may match with our bulb directly, then replace directly.
The LED Flexible working voltage is DC 5V ,LED Module uses DC5V or DC12V. 

3.3 Are there only two kinds of working voltages(110v and 220v)? And can we use other working voltages?

Some Products can work within the range in 85-265 VAC ,DC12V,DC 24V,If you need to specify the operating voltage, please contact us.  


3.4 Why are LEDs of some colors more expensive than LEDs of other colors?
 One reason is that different semiconductor materials are used for different color LEDs, and some semiconductor materials are more expensive than others; another reason is that manufacturing costs are different. White LEDs are the most expensive because red, green and blue LEDs are combined together to make a white LED.
3.5 We have seen so many advantages LEDs have over incandescent light and florescent bulbs, are there any disadvantages LEDs exhibit compared with incandescent or florescent bulbs?
Yes, the most significant disadvantage is the light output limitation of LEDs. Currently available LEDs emit limited amount of lights at a relatively small angle range, while incandescent and florescent light bulbs illuminate in all directions. The second significant disadvantage is the high prices of LEDs. The currently available LEDs in the market are 3 ~ 10 times more expensive than equivalent incandescent light bulbs. This is why some customers still hesitate to buy LED products even though LEDs have so many obvious advantages over incandescent bulbs and people actually can save money by using LED products in the long run.
3.6What are the advantages of LEDs compared with conventional incandescent lights?
There are several obvious advantages LEDs have over traditional incandescent light bulbs, they are as follows:
· Low power consumption - energy saving;
· Long lasting,

· Cold lighting,

· Ruggedness,
· Small size and weight,
· Fast switch times,
· Simple to use.
3.7 LED Tube T5, T8, T10 , What does it mean ?
Actually, T stands for the diameter of the LED tube, and each T represents one-eighth inch. So T8, the most familiar LED tube to us, is one inch(eight times one-eighth inch) in diameter. As we all know, one inch equals 25.4mm. Therefore, the diameter of T8 is 25.4mm. T12 means that the diameter of fluorescent tube is 12 / 8 inches. T5 obviously means that the diameter of LED tubes is 0.625 inches.
T12 Diameter of 38.1 mm
T10 Diameter of 31.8 mm
T8 diameter of 25.4 mm
T5 diameter of 16 mm
T4 diameter of 12.7 mm

3.8 How Long Do LEDs Last?

LED’s are extremely reliable by the nature of their design and the way they are constructed. Individual LED’s have very high life expectancy with very low failure rates.
Light Source  Rated Life (hours)* 
Incandescent 750 to 2,000
Halogen incandescent 3,000 to 4,000
Compact fluorescent (CFL) 8,000 to 10,000
Metal halide 7,500 to 20,000
Linear fluorescent 15,000 to 20,000
High power white LED 35,000 to >50,000

 3.9 What do "cool white" and "warm white" mean, and what is CCT?

The Color Correlated Temperature (CCT) is given in the description of each of our white LED bulbs. The color (CCT) of our white bulbs ranges from a warm yellow white (2700K) to a cool blue white (7000K).
By comparison, a typical incandescent bulb has a CCT of 2800K. A typical halogen is a bit higher, maybe 3500K. Daylight white is 4500K and a cool white fluorescent is 6000K or more.
The human eye adapts to background light so that even a daylight white bulb will look slightly blue in a room illuminated mainly with incandescent bulbs. Similarly, an incandescent bulb will look very yellow or even orange in midday sunlight.
3.10 Common use of LED parameters: Luminous Flux, Luminous intensity, Luminance, Illuminance, Color temperature, Light Effect, Color rendering
Luminous Flux
Luminous flux is a quantitative expression of the brilliance of a source of visible light, which is electromagnetic energy within the wavelength range of approximately 390 nanometer s (nm) to 770 nm. This quantity is measured in terms of the power emitted per unit solid angle from an isotropic radiator, a theoretical point source that radiates equally in all directions in three-dimensional space. The standard unit of luminous flux is the lumen (lm).

Luminous intensity
Luminous intensity is an expression of the amount of light power emanating from a point source within a solid angle of one steradian . the candela was defined and adopted as the standard unit of luminous intensity. One candela (1 cd) is the magnitude of an electromagnetic field ( EM-field ), in a specified direction, that has a power level equivalent to a visible-light field of 1/683 watt (1.46 x 10 -3 W) per steradian at 540 THz.

Luminance is the luminous intensity, projected on a given area and direction. Luminance is an objectively measurable attribute. The unit is 'Candela per Square Meter' (cd/m2). So, different monitors can be adjusted to the same luminous intensity by measuring the luminance in cd/m2.

illuminance is the total luminous flux incident on a surface, per unit area. It is a measure of the intensity of the incident light, wavelength-weighted by the luminosity function to correlate with human brightness perception.

Light Effect
Light Effect is the rate of the electronic power turning into the light power, It is unit as “ lm/W ”.

Color temperature
Color temperature is a simplified way to characterize the spectral properties of a light source. While in reality the color of light is determined by how much each point on the spectral curve contributes to its output, the result can still be summarized on a linear scale. Standard unit for color temperature is Kelvin (K).

Color rendering
Color rendering: Effect of an illuminant on the color appearance of objects by conscious or subconscious comparison with their color appearance under a reference illuminant Standard unit for color temperature is Ra.

 4. Product Technology (Street lighting):

4.1.How about the replacement between LED Street Light and High Press Sodium Light?

28W, 42W LED Street Light can replace the 75W High Press Sodium Light.

42W, 56W, 70W, 84W LED Street Light can replace the 150W High Press Sodium Light.

98W, 112W., 126W, 140W LED Street Light can replace the 250W High Press Sodium Light.

154W, 168W., 182W, 196W, 210W LED Street Light can replace the 400W High Press Sodium Light.

(Detailed replacement need to base on the different brightness requirement.)

4.2.What is the life Span of the LED Street Light?

Normally, we calculate the lifetime of the light base on the brightness decreased. When the brightness of the LED street light decrease to 70%, we said the LED Street Light life time is finished.

If you want to get more information about our LED Street Light. Please feel free to contact us. Thanks.

 3.How many Cities had installed Anern LED Street Lighting products?

Anern LED Street Lighting products had installed in 50 projects in China and more than 20 countries in the world. Total quantity is more than 30,000 pcs.
(This data is recorded at 31th. Dec. 2010)
 More questions, contact us right now!



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