2-Pack GE Compact Flourescent (CFL) Light Bulbs 15 Watt=60 Watt Bright from the Start 60-watt replacement uses only 15-watts 800 lumens providing comfortable, inviting light Lasts 7.3 years based on 3 hours per day usage Estimated yearly energy costs $1.81 based on 3 hours per day $0.11 per kWh $39 in energy savings over the life of the bulb based on 3 hours per day usage