Sunlite 05529-su sl85/30k/med/277v spiral cfl light bulb, medium base, warm white sunlite high wattage spiral compact fluorescent lamps give off a warm white light much like a 350 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 85 watt 3000k, medium base bulb offers 4200 lumens of light output and has an average rated life of 8,000 hours.