High Pressure Sodium HID Bulb Bulb Base Type Mogul Screw (E39) Bulb Dia 2 1/4 in Bulb Housing Glass Bulb Shape ED18 Color Rendering Index 21 Color Temperature 2100K Lumens 50 000 lm Light Technology High Pressure Sodium Overall Length 9 3/4 in Shatter-Resistant No Voltage 120V Watts 400 W Bulb Beam Angle 360 Degrees Bulb Finish Clear Rated Life 30 000 hr ANSI Code S51 Dimmable No For Enclosed Fixtures Yes Bulb Operating Position Universal Burning