Here's a quick little cost breakdown to show that besides being more eco-friendly, they are actually cheaper...
The following table compares 60W Incandescent Bulbs to their equivalent 15W CFL counterpart. The energy cost is based on the DOE 2006 US Average retail cost of electricity per KWh of $0.104.
|
Incandescent
|
CFL Bulb
|
|
| Life Span |
1,000 hrs
|
10,000 hrs
|
| Energy used over 10K Hrs (KWh) |
600
|
140
|
| Energy Cost of Bulb |
$62.40
|
$14.56
|
| Cost for One Bulb |
$1
|
$4
|
| # of Bulbs used in 10K hrs |
10
|
1
|
| Cost of Bulbs |
$10
|
$4
|
| Total Cost |
$72.40
|
$18.56
|
Even with conservative estimates using incandescent bulbs cost you 4x as much as a CFL!
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