Ans: The LED (light-emitting diode) is a design that emits light when an electric passes through the device. This phenomenon, called electroluminescence in which come out a cold light, it is emitted as a result of mixed chemistry. Whereas LED is different from incandescent bulb, in which light is as a result of heat. Through kinds of semiconductor materials, LED can be emitted as variety of light colors. There are infrared, visible and ultraviolet light.

Ans: LED lighting is called Solid State Lighting (SSL), its light source is LED, it is different from incandescent or HID light; compared to traditional incandescent bulb or fluorescent light, LED lighting is less heat and energy loss. Besides, it provides better anti-shock, vibration and durable. Therefore, lifespan could be increased significantly. United States Department of Energy announces the LED lighting is an important and foreseeable energy technology in coming future

Ans: 1. Energy saving – LED is 10 to 50 times more energy efficient than incandescent light bulb and reduces operating costs up to 90%? 2. Long lifespan – incandescent light products are only rated up to 3,000 hours whereas LED luminaries is last life time up to 100,000 hours; it could last life time more than 10 years even continually use. 3. Safety – Low power consumption, low operating temperature and low heat output in which enables dangerous free even touching under LED lighting in operation because of LED cold temperature character. 4. Durability –LED is SSL, so it is more durable than conventional bulbs and it is more resistant in breakage, crack, vibration, shock and temperature change violently. 5. Small size – High intensity, low weight and small size that let designer in planning is more flexible. 6. Instant response – No flicker, No delay in lighting on. 7. Superior light source – Minor ultraviolet or infrared radiation. 8. Flexible design – Compared to traditional lighting devices, the aesthetic design of LED luminaries are much more unlimited. 9. Modulization – Plug & Play concept design. 10. Special application – LED can be implemented as pulsed or flashed light source.