GE Lighting 78957 Energy-Smart CFL BlackLight 13-Watt (25-watt replacement) T3 Spiral Light Bulb with Medium Base, 1-Pack T3 spiral shape with medium base for use in table lamps and enclosed fixtures 25 watt replacement uses only 13 watts Lasts 7.3 years based on 3 hours per day usage Estimated yearly energy costs $1.57 based on 3 hours per day $0.11 per kWh Blacklight specialty bulb for creating a visually dramatic atmosphere