Utilitech 4-Pack 13-Watt (60W) Spiral Medium Base Daylight (5000K) CFL Bulbs ENERGY STAR 4-Pack 60-Watt Equivalent Daylight Compact Fluorescent Light Bulb ENERGY STAR Uses 13 watts for 900 lumens of brightness (60-Watt Equivalent). Bulb life is 10000 hours. 5000-kelvin color temperature, Natural Daylight /Grow Light Natural day light gives a cooler shade of color best used to enhance room's mood