HID Bulb, Bulb Base Type Mogul Screw (E39), Bulb Dia. 3 1/10 in, Bulb Housing Glass, Bulb Shape ET25, Color Rendering Index 22, Color Temperature 2100K, Lumens 130, 000 lm, Light Technology High Pressure Sodium, Overall Length 15 1/8 in, Shatter-Resistant No, Voltage 250V, Watts 1, 000 W, Bulb Beam Angle 360 Degrees, Bulb Finish Clear, Rated Life 24, 000 hr, Dimmable No, For Enclosed Fixtures Yes, Bulb Operating Position Universal Burning, Standards 3-5/64 in, Trade Number LU1000ECO