GE Lighting 74196 Energy Smart Spiral CFL 10-Watt (40-watt replacement) 520-Lumen T3 Spiral Light Bulb with Medium Base, 1-Pack Uses 10-Watt with 40-Watt light output! New packaging is easier to open and better for the environment Last 8 times longer than a standard incandescent! Going green will save you green! Saves up to 24-Dollar in energy costs