Quartz Metal Halide HID Bulb Bulb Base Type Mogul Screw (E39) Bulb Dia 3 1/2 in Bulb Housing Glass/Metal Bulb Shape ED28 Color Rendering Index 65 Color Temperature 4200K Lumens 20 800 lm Light Technology Metal Halide Overall Length 8 1/4 in Shatter-Resistant No Voltage Not Applicable Watts 250 W Bulb Beam Angle Not Applicable Bulb Finish Clear Rated Life 10 000 hr ANSI Code M58 Dimmable No For Enclosed Fixtures Yes Bulb Operating Position Universal Burning