GE Lighting Black Light 35884 15-Watt, T8 Light Bulb with Medium Bi-Pin (G13) Base, 6-Pack 18-Inch long 1.0-Inch diameter T8 with medium bi-pin (g13) base Uses 15-Watt Lasts 3.4 years based on 6 hours per day usage Use everywhere you want to create a visually dramatic atmosphere