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 36 000 lm Light Technology Metal Halide Overall Length 8 1/4 in Shatter-Resistant No Voltage 135V Watts 400 W Bulb Beam Angle 360 Degrees Bulb Finish Clear Rated Life 15 000 hr Dimmable No For Enclosed Fixtures Yes Bulb Operating Position Universal Burning Trade Number M400UED28 High Output Yes