GE Lighting Reveal 3-way 79398 50/100/150-Watt, 430/1070/1500-Lumen A21 Light Bulb with Medium Base, 2-Pack Uses 50/100/150-watts 430/1070/1500 lumens providing clean, beautiful light Lasts 1.8 years based on 3 hours per day usage Estimated yearly energy costs $6.02/$12.05/$18.07 based on 3 hours per day $0.11 per kWh A21 shape with medium base for use in table lamps and enclosed fixtures