GE Lighting 19878 Efficient Halogen 50-watt, 400-Lumen PAR36 Very Narrow Spotlight Bulb with Screw Terminal Base, 1-Pack Uses 50 watts 400 lumens providing cozy, relaxing light Lasts 3.6 years based on 3 hours per day usage Estimated yearly energy costs 6.02 based on 3 hours per day 0.11 per kWh PAR36 indoor/outdoor spotlight with medium base for use in outdoor security lighting and indoor directional fixtures