We are shanghai yangtai lighting co. Ltd. Our company is professional manufacture hid lamps, such as high-pressure sodium lamps, american standard sodium lamps, blended light lamps, high-pressure mercury lamps, american standard mercury lamps, arc-tube of hps and so on. Our company mainly stockholders and technicians were come out of shanghai philips company. Making use of philips advanced technology and management. And we also get philips help they provide high quality lamps materials for my factory. So our products quality can reach philips standard. In china, our company is the only one company that can reach philips quality. So we can supply high quality and less expensive hid lamps. Now we do ome for many famous lighting companies. We firmly believe rely on best quality, provide good service, certainly can achieve splendid with the consumers and merchants of home and abroad.