Sunlite 05577-su sl65/65k/med 65w spiral cfl light bulb, medium base, daylight sunlite high wattage spiral compact fluorescent lamps give off a daylight light much like a 300 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 65 watt 6500k, medium base bulb offers 3400 lumens of light output and has an average rated life of 8,000 hours.