... 20,000 hours4) Cost-effectiveness of power consumption5) Golden-color light output, strong fog penetrating capacity (helpful to drivers' eyestrain, beneficial ... )6)Professional HID manufacturer, full range of high pressure sodium lamp 35-1000w7) EU and American standard, CE and RoHS certified ... in roads,Lighting of stations, airfields, wharfs, freight, transport stations. 600w HPS street lamp