4 Pack GE Energy Smart CFL 11 Watt Daylight Decorative G25 Light Bulbs (40W Incandescent Replacement) 9.1 Year Life (4 Pack) Includes 4 GE Energy Smart CFL 11 Watt Daylight Bulbs Standard Base Medium Screw (E26) Instant Brightness but not dimmable. 450 Lumens Only uses 11 Watts of energy to replace an incandescent 40 watt bulb 9.1 Year Life based on 3 hours a day