Quartz Metal Halide HID Bulb Bulb Base Type Mogul Screw (E39) Bulb Dia 3 1/2 in Bulb Housing Glass/Metal Bulb Shape ED37 Color Rendering Index 60 Color Temperature 4000K Lumens 36 000 lm Light Technology Metal Halide Overall Length 11 1/2 in Shatter-Resistant No Voltage Not Applicable Watts 400 W Bulb Beam Angle Not Applicable Bulb Finish Clear Rated Life 20 000 hr ANSI Code M135/M155 Dimmable No For Enclosed Fixtures Yes Bulb Operating Position Universal Burning