Sunlite spiral compact fluorescent lamps are ultra compact, fit into most standard fixtures and give off a "daylight" like light much like a 100 watt incandescent bulb. These energy efficient CFL lamps can last up to 9 years with normal household use of 3 hours a day. This Sunlite energy saving 23 watt daylight spiral CFL medium base bulb an average rated life of 10,000 hours. Very versatile and great for ambient lighting.23 watt compact fluorescent bulb, 120 Volt100 watt a19 incandescent bulb equivalent10,000 hour life span at the average 3 hour day usageDaylight like light appearance, E26 Medium baseIdeal for general use