This Ushio BTL Lamp (500W / 120V) is a tungsten halogen bulb for compatible light fixtures and projectors.  It has a base of P28s medium prefocus which is used in Industrial Light and Specialty Lamps. It's color temperature is 3050k, it has a filament of C-13D, and it has a lumens of 11000. This Ushio 500 watt BTL has a maximum overall length of 4.953 inches, a rated life of 500 hours and a shape of T6.