This Sylvania light bulb uses 9 watts, has a color temperature of 4100k and a dimmer compatibility. This bulb has a single tube 2-pin shape and a rated life of 20,000 hours. It has a maximum overall length of 5.70 inches, and a lumen of 600.Features •Sylvania CF9DS/E/841 ECO Compact Fluorescent Lamp •Dulux S/E 4-Pin Single Tube Bulb for use with Dimming or Electronic Ballast •EOL Protection