High Intensity Discharge (HID) Lamp, Metal Halide Lamp Type, 250 Watts, ED28 Lamp Shape, M58 ANSI Number, Lamp Designation MH250/U/M58/E, Mounting Position VBU, Clear, For Use With Enclosed Fixtures, 12K Average Life (Hours), Max. Overall Length 8 5/16 In., 22,000 Initial Lumens, 4200 Color Temp., 65 CRI, Case Quantity 6, E39 Base, 17,500 Mean Lumens, Light Center Length 5.00 In.