The Ushio JT120V-500WB is a clear 500 Watt Lamp. 11000 lumens, 3200 degrees Kelvin, and burns for 2000 hours in any position. Perfect for Chimera Mogul based E39 Sockets. The entire lamp measures 7.5" end to end, and the glass portion is 5.5" in length. Although the mogul screw base looks like a common household base, its not- it's twice the size.