Plug-In CFL Bulb, T4 Bulb Shape, 4-Pin (GX24Q-4) Bulb Base Type, Compact Fluorescent, 2690 lm, Dimmable Yes, 42 W, Ballast Dependent, Trade Number F42TBX/A/ECO, 17, 000 hr Rated Life, Bulb Type Plug-In, 3, 000 K, 3000 to 3999K, Warm White Light Appearance, 5 1/2 in Overall Length, Bulb Primary Application General Purpose, Shatter-Resistant No, Bulb Start Type Preheat, Color Rendering Index 82.0