LED (Light Emitting Diode), light emitting diodes, mainly by the holder, silver paste, wafer, gold, epoxy resin composed of five kinds of materials. LED is a way to convert electrical energy into light energy of the semiconductor, it changed the incandescent tungsten light and energy saving lamp luminous three-color dye, while the use of electric light. According to the analysis, LED very obvious characteristics, long life, high luminous efficiency, low radiation and low power consumption. White LED spectrum almost all concentrated in the visible light spectrum, the luminous efficiency of more than 150lm / W (2010 年). The LED with ordinary incandescent lamp, spiral energy-saving lamps and T5 fluorescent trichromatic comparison, the results show: ordinary incandescent light efficiency of 12lm / W, life less than 2000 hours, the luminous efficiency of spiral CFLs 60lm / W, life expectancy is less than 8000 hours, T5 fluorescent lamps compared to 96lm / W, life of about 10,000 hours, while the diameter of 5 mm white LED luminous efficiency can theoretically be more than 150lm / W, life can reach 100,000 hours. It was also predicted that the future of LED lifetime limit will be infinite. With the improvement of LED cooling technology, outdoor lighting LED lights, spot lights, high power LED lighting, and industrial production has started to be a lot of applications. For high color temperature and color requirements of indoor lighting stage lights, studio lights, etc. have also been put into mass production and application. Scope largest, is also the largest amount of general lighting T8, T5, T4 and replace incandescent lamps and CFL bulb screw have been formed, has up to 50,000 hours life. LED lighting has entered a period of rapid development. 2 packages based editor strange use the occasion, a strange shape scales, heat, and light-emitting action plan. LED package a variety of ways. Current, LED packages classified according to the primary there Lamp-LED (vertical LED), TOP-LED (top emission LED), Side-LED (light-emitting side LED), SMD-LED (SMD LED), High-Power-LED ( High-power LED), Flip Chip-LED (flip chip LED), etc.