Quote:
Originally Posted by Slava
If you can live with those figures then I'm just coming right out and saying that there is no way you are saving $1.00/month per bulb as some people suggest in this thread. I would be paying next to nothing, and you would see the bill for this portion cut in half! Most of that energy use in my house is either the furnace or A/C, along with things like computers, cable boxes, dishwashers, etc. Eventually down the list you get to lightbulbs, but surely this is nowhere near the use of these other things.
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It sounds like a lot, but the math doesn't lie. The extra fees are on top of the power usage. For the parts of the fees that are charged as a per kwh cost, it only makes the savings greater.
Let's say that you replace 20 bulbs, of course, some of those bulbs are in rooms that you don't have lights on nearly as much, so let's say that each bulb is on for an average of 3 hours per day, averaged out over the entire year.
For Incandescent Bulbs:
20 bulbs x 60 watts x 3 hours per day x 365 days = 1,314 kwh per year
1314 kwh x $0.08 per kwh =
$105.12 per year = $8.76 per month
For CFL bulbs:
20 bulbs x 13 watts x 3 hours per day x 365 days = 284.7 kwh per year
284.7 kwh x $0.08 per kwh =
$22.78 per year = $1.90 per month
For LED bulbs:
20 bulbs x 6 watts x 3 hours per day x 365 days = 131.4 kwh per year
131.4 kwh x $0.08 per kwh =
$10.51 per year = $0.88 per month
It may not be 8 hours per day averaged over the year that you have lights on, but its likely a little bit more than 3.