GE Lighting Garage Lighting & Basement 10183 15-Watt, 760-Lumen T12 Light Bulb with Medium Bi-Pin Base, 6-Pack 18-Inch long 1.5 inch diameter T12 with medium bi-pin (g13) base Uses 15-watts Provides 760 lumens Lasts 4.1 years based on 6 hours per day usage