GE Lighting 66390 Energy smart LED 9-Watt (40-watt replacement) 450-Lumen A19 Light Bulb with Medium Base, 1-Pack 40 watt replacement uses only 9 watts Provides 450 lumens Lasts 22.8 years based on 3 hours per day usage Estimated yearly energy costs Dollars 1.08 based on 3 hours per day Dollars 0.11 per kWh $110 in energy savings over the life of the bulb based on 3 hours per day usage.Dimmable LED Bulb.