45-watt replacement uses only 11-watts 400 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 $37 in energy savings over the life of the bulb based on 3 hours per day usage R20 CFL bulb case of 10 bulbs