LED lamp is difficult to enter the people's home above has introduced the white light led's characteristic and the performance enhancement, and develops the white light LED lamp which applies to various occasions, but the LED lamp is difficult to enter the populace home. This is not a problem in production, the main reason is that white light LED lighting efficiency is not too high, and the price is too expensive, so that ordinary people are difficult to accept home. The price comparison of the 1W white LED is $number yuan, the unit price of 3W is $number (with the quality of LED and brand), and the driving circuit and structural parts are also needed. Considering the profits of the manufacturers and commercial profits, the unit price may be more than 120 yuan.
LED Light Road in the Ho Fangbai LED lighting promotion and popularization of the significance of very important, but really to enter the people's home in China have a lot of work to do. The popularization and popularization of white LED lighting is a system engineering and major project, which needs the country's planning, guidance and support, as well as policy and economic supports. China in Shanghai, Nanchang, Dalian, Xiamen has established four major semiconductor lighting base and related research units, they will be the promotion of LED lights play a significant role. LED lighting Although still difficult to enter the people's home, but there are many areas can be used for a large number of LED lights. The application of these fields can promote the production of high-power white LED, promote the improvement of technology, and reduce the cost of production. In LED lighting design, application can also gain more experience, conducive to future promotion. These applications are large-power consumers, energy-saving can play a big role. They are: 1. Street lighting Systems in town streets (including solar street lighting systems) 2. Tunnel and underground car park (including underground shopping centre); 3. Lighting of means of transport (interior and part exterior lights of automobiles, trams, ships, aircraft, etc.); 4. LED lighting systems in large public places such as train stations, subway stations, airports, large supermarkets, large department stores, buildings and hospitals, etc. 5. LED lighting works without electric area. Because of the LED lighting general use of low-voltage DC (constant current) power supply. If the use of AC 220V mains supply, the need for special power transformer output low-voltage DC (such as 12V, 24V, etc.) and led by the driver to drive LED lights, as shown in Figure 3. Therefore, it is better to take into account the use of LED lights when building these buildings, and it is much more economical to design it in architecture. The lighting system for the original fluorescent lamp of the building should be transformed into LED lighting, the cost of the transformation is large, and the time of transformation is long (such as the renovation of a subway station or a terminal Hall lighting system). The new LED lighting power supply system needs to be more complex than the traditional lighting power supply system, the cost is much higher, without policy support and economic support is difficult to succeed.