GE Lighting 47486 Energy Smart CFL 11-Watt (40-watt replacement) 500-Lumen A17 Light Bulb with Medium Base, 1-Pack 11-Watt Light Bulb Rated Life of 10,000-Hour 11-Watt A17 Energy Smart CEILING FAN CF FLE11/2/A17XL/CD - GE for every application 550-Lumen output and 11-Watts used, Lumens measure brightness of a light bulb, Watts measure electricity used to create light