GE Lighting 78964 Energy Smart CFL 24-Watt (100-watt replacement) 1185-Lumen PAR38 Floodlight Bulb with Medium Base, 1-Pack 100-watt replacement uses only 24-watts 1185 lumens providing fresh, energizing light Lasts 9.1 years based on 3 hours per day usage Estimated yearly energy costs $2.77 based on 3 hours per day $0.11 per kWh $72 in energy savings over the life of the bulb based on 3 hours per day usage