Metal Halide Lamp, 65, 3700 K, 105000 LM (Horizontal);115000 LM (Vertical) Brightness (Lumens), 1000 W, Clear, Hard Glass Material, 9000 H (Horizontal);12000 H (Vertical) Average Life, Mogul Base, M47 Ansi Ballast Code, Non Dimmable, 4.625 In Diameter, 11.5 In Height, 150 % Mercury Content, 4.45 LB