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C&G LED FAQ - Q10-Q14

Article Index
C&G LED FAQ
Q4-Q9
Q10-Q14
Q15-Q19
Q20-Q28
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Q10. What’s LED different from Incandescent and fluorescent?


LEDs differ from traditional light sources in the way they produce light.

In an incandescent lamp, a tungsten filament is heated by electric current until it glows or emits light.

In a fluorescent lamp, an electric arc excites mercury atoms, which emit ultraviolet (UV) radiation. After striking the phosphor coating on the inside of glass tubes, the UV radiation is converted and emitted as visible light。



Q11. Are LEDs affected by extreme conditions?


LEDs are geared for harsh environments and are used for both normal and extreme applications indoor and outdoor. LEDs function from -40F to 180F easily operating in environments where incandescent and fluorescent bulbs fail. There is no delay or required "warm up time" for LEDs to function.



Q12. What is an LED driver?


An LED driver is a self-contained power supply that has outputs matched to the electrical characteristics of your LED or array of LEDs.  Drivers should be current-regulated (deliver a consistent current over a range of load voltages). Dimmable LED drivers may also offer dimming by means of pulse width modulation (PWM) circuits. Drivers may have more than one channel for separate control of different LEDs or arrays.

 


Q13. What is the useful life of LED bulbs?


High quality, white LED bulbs last for 50,000 hours.

Useful life or active life of incandescent bulbs stands for the time it takes for half the bulbs in a carton to burn out.  Most bulbs have a useful life of 1,000 hours, but halogens last closer to 3,000 hours.

What is 50,000 hours? It is 50 times the life of a typical incandescent bulb and 5 times the lifetime of an average compact fluorescent lamp. In fact, if you ran one Green Lighting LED lamp for 6 hours per day every day, it would last for nearly 23 years. That is five presidential elections, a home remodeling or a full generation. You may never change another light bulb again.

 


Q14. Why do LEDs use such little power?


LEDs do not use a filament where a conductor is heated and light is created. Filament based lighting consumes more power than the light produced. LEDs produce very little amounts of heat and do not use filaments making them far more efficient in consumption and output.