Bulbrite CF13WW/GU24 13Watt Twist and Lock Compact Fluorescent Coil Bulb Saves up to 75 Percent in energy costs Equivalent to a 60W Standard Incandescent Bulb Long Life - average 10,000 hours GU24 Twist and Lock CFLs available in Coil, A-Shape, Globe, and Reflector Styles Energy Star Approved