Lights of America 2212DLEDNR20-LF3-8 10-Watts 330-Lumen Power LED Dimmable Warm White Light Bulb for Ceiling fan and Track Lights Bulb measures 2.5 by 2.5 by 4-Inch Designed for ceiling fan and track lights 80 CRI and 3000K color temperature and rated for 25,000 hours Estimated energy costs are $1.20 a year 3 year limited manufacturer warranty