Incandescent Bulb, Bulb Base Type Single Contact Bayonet (BA15s), Bulb Housing Glass, Bulb Shape S8, Bulb Finish Clear, Color Rendering Index Not Applicable, Color Temperature 2700K, Lumens 264 lm, Light Technology Incandescent, Shatter- No, Trade Number 307, Voltage 28V AC, Watts 18.76 W, Bulb Beam Angle Not Applicable, Rated Life 300 hr, Dimmable No, For Enclosed Fixtures No, Three-Way No, Light Color White, Indoor/Outdoor Usage Indoor Only, Overall Length 2 in