HID Metal Halide Lamp, Designation: MH1500/BT56/U/4K, 1500 WTT, BT56 Shape, E39 Mogul Base, Clear, 3000 HR, Lumens: 167000 LM Initial, 4200 DEG K Color Temperature, Cool White 65 CRI, 15-3/8 IN Length, 7 IN Diameter, Burn Position: Universal