How do CFLs and incandescent bulbs compare in terms of electricity consumption?
On average, CFLs require about 75 percent less electricity than an incandescent bulb of similar light output. For example, a 60 watt incandescent bulb can be replaced by a 15 watt CFL. So for every hour of operation, the CFL uses 45 fewer watts of electricity. Assuming an average Kilowatt/hour cost of $.10, each CFL will save a homeowner an average of $45 over the life of the CFL.