High Pressure Sodium HID Bulb, Bulb Base Type Medium Screw (E26), Bulb Dia. 2 3/20 in, Bulb Housing Glass, Bulb Shape BD17, Color Rendering Index 12, Color Temperature 2100K, Lumens 4,000 lm, Light Technology High Pressure Sodium, Overall Length 5 3/8 in, Shatter- No, Voltage 62V, Watts 50.2 W, Bulb Beam Angle 360 Degrees , Bulb Finish Clear, Rated Life 24,000 hr, ANSI Code S68, Dimmable No, For Enclosed Fixtures Yes, Bulb Operating Position Universal Burning