GE Lighting 66663 Energy Smart Dimming CFL 26-watt 1635-Lumen T3 Spiral Light Bulb with Medium Base, 1-Pack 100 watt replacement uses only 26 watts 1635 lumens providing strong, vibrant light Lasts 9.1 years based on 3 hours per day usage Estimated yearly energy costs 3.13 based on 3 hours per day 0.11 per kWh 81 in energy savings over the life of the bulb based on 3 hours per day usage