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