PureSpectrum 20W Fully Dimmable Spiral CFL(2 Pack) 2700K 6000 hours (75W Equivalent) Uses 75% less electricity than incandescent bulbs Instant illumination and brightness Watts: 20 (dims in linear regression from 100% to 20% of perceived light output) Reduced energy usage during dimming Rated for 6,000 hours and High Power Factor (&gt;.09)