Replacing just one 60-watt incandescent light bulb with a CFL wil save $30 over the life of the bulb.
CFLs also last 10 times longer than incandescent bulbs,use two-thirds less energy , and give off 70 percent less heat.
If every U.S. family replaced one regular light bulb with a CFL, it would eliminate 90 billion pounds of greenhouse gases , the same as taking 7.5 million cars off the road.