GE Lighting Reveal Halogen 3-way 71367 150-Watt, 1840-Lumen A21 Light Bulb with Medium Base, 6-Pack 560/1280/1840 lumens providing clean, beautiful light Lasts 2.3 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 2850K light appearance