GE Lighting 80891 Energy Smart Spiral CFL 42-watt 2700-Lumen 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