HID Bulb, Bulb Base Type Mogul Screw (E39), Bulb Dia. 3 1/2 in, Bulb Housing Glass, Bulb Shape BD17, Color Rendering Index 65, Color Temperature 4000K, Lumens 13,300 lm, Light Technology Metal Halide, Overall Length 8 1/8 in, Shatter-Resistant No, Voltage Ballast Dependant, Watts 175 W, Bulb Beam Angle 360 Degrees , Bulb Finish Frosted, Rated Life 10,000 hr, ANSI Code M57/E, Dimmable No, For Enclosed Fixtures No, Bulb Operating Position Universal Burning, Standards ANSI, Trade Number MH175/C/U