Screw-In CFL Bulb T2 Bulb Shape Medium Screw (E26) Bulb Base Type Compact Fluorescent 900 lm Dimmable No 13 W 120V AC Trade Number 13T2/27 12 000 hr Rated Life Bulb Type Standard 2700K 2700 to 2999K Soft White Light Appearance 4 1/8 in Overall Length Bulb Primary Application General Purpose Shatter-Resistant No High Output No Bulb Power Source Plug and Play Bulb Start Type Rapid Color Rendering Index 82.0.