Incandescent Heat Bulb R40 Bulb Shape Medium Screw (E26) Bulb Base Type Incandescent Not Rated Heat Lamp 250W 120V AC Trade Number 250R40/HT/RED Bulb Primary Application Heat Lamps Reflector Bulb Type No Rated Color Temp Red 105 Degrees Bulb Beam Angle Indoor/Outdoor Usage Indoor Only Shatter-Resistant Yes Rough Service No Dimmable No Bulb Finish Red Bulb Housing Glass 5 in Bulb Dia 6 1/2 in Overall Length Rated Life 5 000 hr