In consideration of the building energy saving, LED lighting system are the most popular lighting design for the whole building. In compare with the traditional fluorescent lamps, the lighting power would be reduced almost 85% by using the LED lighting. Also, LED is designed to focus its light, and it can be oriented to a specific position without using an external reflector, so as to achieve higher application efficiency than traditional lighting. The well-designed LED lighting system can more effectively transmit light to the required location.