GE, MVR250/U/CP, 250W, Clear Multi-Vapor Metal Halide Lamp, ED28 Bulb Shape, Universal Burn Position, Mogul Base, MOL=8.25", 10,000 Hour, 20800 Lumens, 4200 Kelvin Color Temperature, CRI=65, M58 ANSI Ballast Type, 90% @ 50% Of Life Lumen Maintenance, Universal Burn Position, For Open Or Enclosed Fixtures.