Quartz Metal Halide HID Bulb, Bulb Base Type Mogul Screw (E39), Bulb Dia. 3 1/2 in, Bulb Housing Glass, Bulb Shape ED28, Color Rendering Index 65, Color Temperature 4000K, Lumens 14,400 lm, Light Technology Metal Halide, Overall Length 8 1/4 in, Shatter-Resistant No, Voltage 132V, Watts 175 W, Bulb Beam Angle 360 Degrees , Bulb Finish Clear, Rated Life 10,000 hr, Dimmable No, For Enclosed Fixtures Yes, Bulb Operating Position Universal Burning, Trade Number M175UED28, High Output Yes