Although the incandescent lamps and halogen tungsten lamps for general lighting are cheap, they have low luminous efficiency (the thermal effect of the lamp consumes nothing power), short lifespan and heavy maintenance workload. However, if white light LEDs are used for lighting, not only the luminous efficiency is high, but also the lifespan Long (more than 10,000 hours of continuous working time), almost no maintenance. The German Hella company used white LEDs to develop aircraft reading lights; a street in the Australian capital Canberra has used white LEDs for street lighting; my country’s urban traffic management lights are also replacing early traffic order indicators with white LEDs. It is foreseeable that in the near future, white LEDs will surely enter the home to replace the existing lights.
LED light source has the advantages of using low-voltage power supply, low energy consumption, strong applicability, high stability, short response time, no pollution to the environment, multi-color light, etc. Although the price is more expensive than existing lighting equipment, it is still considered to be it. It will inevitably replace the existing lighting devices.
