The study of blue light LED had started since 1973 by Tokyo Institute of Panasonic. Later they successfully developed blue light LED in 1989.In 1993, a 39 year old staff working in Nichia Corporation had finally invented blue light LED with commercial value which triggered the new reform in lighting technology. It was with this invention the staff won the Millennium Technology Prize in 2006 which equals the Nobel Prize in technology field. No long after that, people can get white light LED by adding yellow fluorescent powder to blue light LED. The fluorescent technology can make LED in any color (such as purple and pink). The appearance of blue and white light LED has broadened the application area of LED Area Light and made full color LED screen and LED Lighting possible.Lighting technology is going through a historical reform of changing from bulb and florescent lamp to LED Lights .