... R7S Bulb Design. RA=65,Long Life.Professional HID manufacturer, full range of metal halide bulb 50,70,100,150,175 ... , average of 100LM/W3) Wider ranges of color temperature: 3,000 - 20,000K4)With differnt Bulb Shape:Tubular/BT/ED ... 21500006000E40BTClear65MH-BT1000W/CL/6K100060002654.3800006000E40BTClear65MH-BT2000W/CL/4K200042002309.3240005000E40BTClear65 E40 High power metal halide light 250W-400W