Early products of low luminous efficiency, light intensity generally only reach a few to dozens of MCD, used in indoor places, used in household appliances, instrumentation, communications equipment, computer and toys etc.. At present, the direct goal is to LED light source to replace incandescent and fluorescent lamps, this trend has begun to develop alternative from local applications. Japan in order to save energy, light emitting diode project is planning to replace incandescent lamps (referred to as the "light of Japan"), the first five years of the budget of 5000000000 yen, if the incandescent lamp and fluorescent lamp replace half of LED, equivalent to annual savings of 6000000000 liters of crude oil energy generating capacity equivalent to five 1.35 x 106kW core the power station, and can reduce carbon dioxide and other greenhouse gas production, improve people's living environment to live. Semiconductor lighting plan in 2004 China also vigorously develop energy-saving environmental protection investment 5000000000.