GE Lighting 15904 32-Watt 2800-Lumen 4-Foot T8 Ecolux Fluorescent lamp, Cool White, 12-Pack 48-Inch long 1.0 inch diameter T8 with medium bi-pin (g13) base Uses 32-watts Provides 2800 lumens Lasts 9.1 years based on 6 hours per day usage