GE Lighting 97728 Energy Smart Spiral CFL 42-Watt (150-watt replacement) 2700-Lumen Spiral Light Bulb with Medium Base, 1-Pack 150-watt replacement uses only 42-watts 2700 lumens providing strong, vibrant light Lasts 11.0 years based on 3 hours per day usage Estimated yearly energy costs $5.06 based on 3 hours per day $0.11 per kWh $142 in energy savings over the life of the bulb based on 3 hours per day usage