Lighting can account for approximately 20 percent of typical household electricity costs. (Source: "Lighting for Home: Powerhouse Home Comfort Tips", Alliant Energy, 1998, p. 2) Using compact fluorescent lamps can help to reduce electricity costs - particularly if the light fixtures replaced are those that tend to be on the most.
Solid State Lighting includes LED technology, which is an emerging new energy efficient lighting option. The U.S. Department of Energy's Building Technologies Program offers a wealth of current information about various aspects of LEDs. (more info)