GE Lighting 78940 Energy Smart CFL 11-Watt (40-watt replacement) 460-Lumen A17 Light Bulb with Medium Base, 3-Pack 40-watt replacement uses only 11-watts 460 lumens providing cozy, relaxing light Lasts 9.1 years based on 3 hours per day usage Estimated yearly energy costs $1.32 based on 3 hours per day $0.11 per kWh $31 in energy savings over the life of the bulb based on 3 hours per day usage