GE Lighting Garage Lighting & Basement 10143 15-Watt, 825-Lumen T8 Light Bulb with Medium Bi-Pin Base, 6-Pack 18-Inch long 1.0 inch diameter T8 with medium bi-pin (g13) base Uses 15-watts Provides 825 lumens Lasts 3.4 years based on 6 hours per day usage