GE Saf-T-Gard 26371 150-Watt, 1700-Lumen PAR38 Light Bulb with Medium Base, 12-Pack PAR38 shape with medium base for use in rough service applications Uses 150-Watt Input Voltage = 120-Volt Provides 1700 lumens Lasts 1.8 years based on 3 hours per day usage