High Intensity Discharge (HID) Lamp, Metal Halide Lamp Type, 250 Watts, ED28 Lamp Shape, M58 ANSI Number, Lamp Designation MH250/C/U/M58/E, Mounting Position VBU, Coated, For Use With Enclosed Fixtures, 12K Average Life (Hours), Max. Overall Length 8 5/16 In., 21,000 Initial Lumens, 3800 Color Temp., 65 CRI, Case Quantity 6, E39 Base, 16,800 Mean Lumens, Light Center Length 5.00 In.