HID Lamp, Designation: MH400W/C/U STD, Wattage Rating: 400 W, Metal Halide Lamp, Mogul E39, ED37 Shape, 34000 lm Initial, 22000 lm Mean, 20000 hr Average Life, Color Rendering Index (CRI): 70, 3700 K, Probe Start, Coated, 121 in Dia x 292 in L, Standards/Approvals: ANSI M59 Specified