This is not news, but I hadn't realized how much saving. Simple calculations show that CFLs save 2/3 of of the cost of incandescents when electricity costs are included. What I found:
95% of the cost of an incandescent is the cost of electricity, compared to about 3/4 for CFL.
The total cost of a CFL is about 1/3 of the six incandescents needed to get the same amount of lighting.
There is no break-even point for buying bulbs - the total incandescent cost exceeds the CFL cost after 700 hours, which is below the incandescent lifetime.
-----------------------------------
Details of calculation:
CFL = 25W costs $5.00 & lasts 6000 hours
Incandescent = 100W costs $0.50 & lasts 1000 hours (need 6 bulbs to equal 1 CFL)
Cost of electricity = $0.091/kWh (in Columbus, Feb. 2008)
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment