EcoSmart 40W Equivalent Daylight A19 Energy Star + Dimmable LED Light Bulb (4-Pack) Brightness: 470 lumens, Light appearance: 5000K (daylight) Estimated yearly energy cost: $0.67 (based on 3 hours/day, 11/kWh. cost depends on rates and use) Life: 22.8 years (based on 3 hours/day), long lifetime Energy used: 6.5-Watt (equivalent to a 40-Watt standard incandescent light bulb) For use with light dimmers, compatible with most dimmer switches, it is dimmable as well as Omni-directional, indoor lighting applications