Quartz Metal Halide HID Bulb Bulb Base Type Mogul Screw (EX39) Bulb Dia 4 5/8 in Bulb Housing Glass/Metal Bulb Shape ED37 Color Rendering Index 65 Color Temperature 4000K Lumens 42 000 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