With the least amount of energy to ensure the required level of illumination, the power saving effect is very obvious, generally up to 30%. Today's energy conservation and environmental protection have become a common social concern in all countries of the world, and directly related to the sustainable development of society. In China, lighting power accounts for more than 10% of total power generation; in the UK, energy applied to lighting accounts for about 5% of total energy consumption. This number can be reduced if electricity is used efficiently. China's electricity is mainly from coal burning. Lighting power saving means reducing the emission of harmful gases such as CO2, SO2 and NO2, and reducing pollution to the atmospheric environment.