TerraBlog from TerraPass: Fight global warming, promote alternative energy
Even if you are filthy rich, the environmental incentives are high. Changing a standard 75W bulb to a 20W compact fluorescent will save 500 lbs of coal and 1300 lbs of carbon. The new CCF bulbs are even more efficient, typically boosting efficiency 4-7x over regular incandescents:
Dimmability: the CCFs are dimmable, with no hum.
Size: CCFs fit in all fixtures, unlike some long or snow-cone CFs.
Longevity: CCFs last up to 25,000 hours.