In order to illustrate the characteristics of white-light LED, take a look at the status of the lighting source. Incandescent and halogen lamps, the luminous efficacy 12~24 LM/w fluorescent and HID lamps light efficiency for the 50~120 lumen/Watt. White-light LED: in 1998, the white light LED light efficiency of only 5 lumens/Watt, and by 1999 had reached 15 lumens per watt, this indicator with a similar general household incandescent bulbs, and in 2000, white LED light effect has reached 25 LM/w, tungsten halogen lamps for the index and similar. Predicts that by 2005, the LED luminous efficiency of up to 50 lumens/Watt, and by 2015, LED luminous efficiency is expected to reach 150~200 lumen/Watt. When white light LED operating current up to amp level. Thus develops white LED lighting for writers, will become reality.
Incandescent and halogen lamps for general lighting is cheap, but low luminous efficiency (light heat white power), the short life of maintenance, but if a white-light LED lighting not only high luminous efficiency and long life (continuous working time for more than 10,000 hours) and almost no maintenance.
LED light source with low voltage power supply, less energy-consuming, applicability, high stability, short response time, environmental pollution, multi-color light emitting and the advantages, while prices expensive than existing lighting equipment, still considered inevitable that it will replace the existing lighting devices.