Crownkingdom Electrical co. ltd is a high-tech enterprise to research and develop, produce and market the relevant product of LED(light-emitting diode), which its products cover the application and production of semiconductor illumination card of pattern, the research and production of LED backlighting card of pattern and that of the complete display. All products adopted the top research strategies and achievements on LED in Taiwan and it possessed all the features of LED. In 2007, Crownkingdom takes the product researching mode that developing 10 standardized products on the basis of 4 cards of pattern as its standard of industry. It begins to devote itself to the development and application of the white-light LED street lamp with high brightness, the solar-powered LED street lamp and the landscape lamp etc. It also possesses the patent of the technology to research and develop the LED white-light and backlighting card of pattern. The series products of developed LED street lamp have been applied to the road illumination in several big cities, such as Shenzhen, Xiamen etc.