Electric lighting burns up to 25% of the average home energy budget. The electricity used over the lifetime of a single incandescent bulb costs 5 to 10 times the original purchase price of the bulb itself. Compact Fluorescent Lights (CFL) and Light Emitting Diode (LED) bulbs have revolutionized energy-efficient lighting.
CFLs are simply miniature versions of full-sized fluorescents. They screw into standard lamp sockets, and give off light that looks just like the common incandescent bulbs - not like the fluorescent lighting
energy efficient lighting we associate with factories and schools. LEDs are small, solid light bulbs which are extremely energy-efficient.
U.S. Department of Energy
http://www.energy.gov/energyefficiency/index.htm
Californians Against Waste
www.cawrecycles.org/ files/images/CFLjpeg.jpg 
