Sunlite Colored Spiral Compact Fluorescent lamps are ultra compact, fit into most standard fixtures and give off an eye catching blue light much like a 100 watt incandescent bulb. These energy efficient CFL lamps can last up to 7 years with normal household use of 3 hours a day. This Sunlite Energy Saving 13 watt blue spiral CFL medium base bulb an average rated life of 8,000 hours. Very versitial and great for ambient lighting.