Incandescent Bulb, Bulb Base Type Midget Flanged (F3-6), Bulb Housing Glass, Bulb Shape T1, Bulb Finish Clear, Color Rendering Index Not Applicable, Color Temperature 2300K, Lumens 2 lm, Light Technology Incandescent, Shatter- No, Trade Number 6839, Voltage 28V AC, Watts 0.672 W, Bulb Beam Angle Not Applicable, Rated Life 4,000 hr, Dimmable No, For Enclosed Fixtures Yes, Light Color White, Rough Service No, Indoor/Outdoor Usage Indoor/Semi-Protected Outdoor, Overall Length 23/64 in