High Pressure Sodium HID Bulb, Bulb Base Type Mogul Screw (E39), Bulb Dia. 4 5/8 in, Bulb Shape ED37, Color Rendering Index 22, Color Temperature 2100K, Lumens 110,000 lm, Light Technology High Pressure Sodium, Overall Length 11 1/2 in, Shatter- No, Watts 750 W, Bulb Finish Clear, Rated Life 24,000 hr, ANSI Code S111, Dimmable No, For Enclosed Fixtures Yes, Bulb Operating Position Universal Burning, Standards Meets 2012 Lighting Legislation Energy, Trade Number LU200/H/ECO