Frequently Asked Questions on LEDs

1. What are LEDs?
LED is an acronym for Light Emitting Diode. LEDs are Solid-State Components. They have

• No Moving Parts
• Are not fragile
• Last for decades

2. How is Light Produced in a LED?
Light Emitting Diode (LED) is a semiconductor Diode. LED consists of p-n (positive-negative) junction made of Semiconducting material. When connected to a power source, current flows from the p-side or anode to the n-side, or cathode, but not in the reverse direction. Charge-carriers i.e. electrons and electron holes flow into the junction from electrodes. When an electron meets a hole, it falls into a lower energy level, and releases energy in the form of a photon (light).

3. What is the life time of LED?
LED has a longer lifespan that can stretch anywhere from 50,000 hours to 80,000 hours. Real lifetime of lamps are closely related to the device and operation, in addition, heat elimination, working temperature, working voltage and current and maximum junction are the important factors in lifetime and Rated lamp lifetime is valued when the lamps are 70% brighter than usual.

Based on how long a fixture is illuminated per day, here's what 50,000 works out to:
Hours of Operation: 50,000 hours is:
24 hours a day 5.7 years
18 hours per day 7.4 years
12 hours per day 11.4 years
8 hours per day 17.1 years

4. What type of Colors you can get in LEDs?
High-brightness LED could produce various colors covering in the whole visible light spectrum; NaBa Green uses either Warm White or Cool White.

5. What is the efficiency of LEDs?
The efficacy of LED changes along with the color and white color temperature. For example, the efficiency of 5000K white light is 15-20% higher than 3000K white light. We provide the maximum luminous efficiency up to 115 lm / w, achieving the maximum output in terms of performance per watt.

6. What is Watt?
Watt is a measure of power consumption. A 100 watt bulb incandescent bulb and 20 watt energy saving bulb give off about the same amount of light, but consume different amounts of power.

7. What is Lumen?
Lumen measures how much light a radiating light produces, but gives no information about energy consumption.

8. What is Candela and Lux?
Candela discloses how much light from a directed light source with a certain dispersion angle reaches a defined point. Lux is the most common measurement of light intensity and states the amount of luminous flux reaching a specific area from a light source.

9. What is Color Temperature?
Kelvin elates to the colour temperature of the light. For example a common bulb has a colour temperature of 2700° Kelvin.
Colour temperature: Hue:
2700 K Incandescent light
3000 K Warm white
4000 K Cold white
6000 K Daylight

10. How are Bulbs rated?
Energy efficiency rating for bulbs and fluorescent tubes
A = More efficient
G = Less efficient
Letter designations in text or figures indicate a bulb s energy efficiency rating on a scale from A to G

11. What will be your saving compared to other sources of Light with LEDs?

INCANDESCENT LAMP:
25W = 3W LEDs	40W = 7W LEDs	75W = 10W LEDs	100W = 15W LEDs
HALOGEN LAMP:
20W = 2-3W LEDs	35W = 4W LEDs	50W = 7W LEDs
HT-SODIUM LAMP:
75W = 30W LEDs	150W = 60W LEDs	250W = 120W LEDs	400W = 180W LEDs

Depending on the actual application, environment and design of LED Fixture, the values may change.

12. What is an Incandescent Bulb?
Incandescent bulbs create light by passing electricity through a metal filament until it becomes so hot that it glows. Incandescent bulbs release 90% of their energy as heat.

13. What is a Halogen Lamp?
Halogen lamps as opposed to common bulbs are filled with halogen. They give substantially more light, up to 100% more than a regular bulb. They also save 30% on electricity, reduce carbon dioxide emissions by 30% and have twice the operating life of a regular bulb.

14. What are CFL or compact fluorescents?
In a CFL, an electric current is driven through a tube containing gases. This reaction produces ultraviolet light that gets transformed into visible light by the fluorescent coating (called phosphor) on the inside of the tube. A CFL releases about 80% of its energy as heat. Energy saving bulbs and compact fluorescents use 80% less energy than a regular bulb and last up to 15 times longer. It remains eco-friendly throughout its entire lifecycle thanks to reduced energy consumption and waste production. Energy saving bulbs contain a small amount of mercury and should therefore be properly disposed of at a recycling.

15. What is a LED Lamp?
LED lighting products use light emitting diodes to produce light very efficiently. The movement of electrons through a semiconductor material illuminates the tiny light sources we call LEDs. A small amount of heat is released backwards, into a heat sink, in a well-designed product; LEDs are basically cool to the touch.

LED stands for Light Emitting Diode. A LED is a semiconductor which produces light within a narrow spectrum. LEDs have very low energy consumption, emit little heat and have an average lifetime of up to 50,000 hours. A LED can unlike other light sources, change color.