HID Metal Halide Lamp, Designation: MH250/ED28/U/4K, 250 WTT, ED28 Shape, E39 Mogul Base, Clear, 12000 HR, Lumens: 20000 LM Initial, 4000 DEG K Color Temperature, Cool White 65 CRI, 8-5/16 IN Length, 3-1/2 IN Diameter, Burn Position: Universal