Pack of 6 PureSpectrum 20-Watt (75-Watt incandescent equivalent) dimmable Compact Fluorescent is a fully dimmable spiral bulb that is compatable with most brand name dimmers. Combines energy savings and longevity with superior dimming performance. Works in any dimming application where an incandescent bulb would be used. Provides instant illumination and brightness without flickering and features low level instant ignition and illumination. Dims equally well as a stand-alone bulb or in a series and provides more than 1,200 lumens. general characteristics max. overall length (mol) max. overall diameter (mod) dimensions 5.5" 2.32" 20W BARE SPIRAL CFL brightness light appearance temperature color rendering index (CRI) photometric characteristics 1200 LUMENS 2700k 82 electrical characteristics input voltage input current to total harmonic distortion (thd) power factor 120v < 33% ≥ 0.9 lamp type self ballasted compact fluorescent bulb T4 base medium screw (e26) energy used 20 watts equivalent wattage 75 watts life (based on 3 hours per day) 5.5 years estimated energy cost (based on $0.11/kWH. cost depends on rates and usage) $2.41per year starting temperature (min) -15o c (5o f)