GE Lighting 78938 Energy Smart CFL 11-Watt (40-watt replacement) 505-Lumen A17 Light Bulb with Candelabra Base, 3-Pack 40-watt replacement uses only 11-watts 505 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