Westinghouse 3702400, 400 Watt E39 Mogul Base, M59/E ANSI ED37 Metal Halide HID Light Bulb Watts: 400, Volts: 120 Color/Kelvin Temperature: Clear/4200K CRI: 65, Lumens (Brightness): 36000, Rated Lifetime Hours: 20000 Base: E39 Mogul