Application prospect of new light source of white LED lighting. To illustrate the characteristics of white LED, first look at the status of the lighting source. Incandescent lamp and halogen tungsten lamp, the light efficiency of 12 to 24 lumens/watt; Fluorescent and HID lamps have a light efficiency of 50 to 120 lumens per watt. For white leds: in 1998, the light efficiency of white leds was only 5 lumens/watt. By 1999, it had reached 15 lumens/watt, which was close to that of ordinary household incandescent lamps. In 2000, the light efficiency of white leds was 25 lumens/watt, which was close to that of halogen tungsten lamps. Some companies predict that by 2005, LED light efficiency can reach 50 lumens/watt, and by 2015, LED light efficiency is expected to reach 150 to 200 lumens/watt. At that time, the operating current of the white LED can reach the ampere level. This shows that the development of white LED writers with lighting sources, will become a possible reality.