LED is a way to convert electrical energy into light energy of the semiconductor, it changed the principle of the three-color dye incandescent tungsten light with energy-saving lamps light, while the use of the EL. According to the analysis, the characteristics of the LED is very obvious, long life, high luminous efficiency, low radiation and low power consumption. White LED spectrum almost entirely concentrated in the visible light spectrum, and its luminous efficiency more than 150lm / W (2010 years).