Sunlite 05235-su sls15/65k/cd1 15w triple tube cfl light bulb, medium base, daylight sunlite triple tube compact fluorescent lamps fit into most standard fixtures and give off a daylight light much like a 60 watt incandescent bulb. These energy efficient cfl lamps can last up to 7.3 years with normal household use of 3 hours a day. This energy saving 15 watt 6500k, medium base bulb offers 825 lumens of light output and has an average rated life of 8,000 hours.