GE Lighting 71992 Energy Smart CFL 11-Watt (40-watt replacement) 450-Lumen A17 Light Bulb with Medium Base, 3-Pack 40 watt replacement uses only 11 watts 450 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 A17 shape with medium base for use in table lamps and enclosed fixtures