It's good news that the industry is phasing out the standard incandescent lightbulbs....you know, the kind we've used for years. They are replacing them with the Compact Fluorescent bulbs which you've no doubt seen gracing the aisles of your home improvement store, and have even slowly made their way into drug stores and grocery stores.
The good news is that not only are they better for the environment (by using less energy), but they also are a good deal for you....the person paying the energy bill. On average, you will recoup the money you spent on the new bulbs in about 6 months.
If you are replacing a 60 watt bulb with a 13 watt CF bulb, you save 47 watts per hour. Let's say that you burn a bulb on average 4 hours a day. That means you save (47x4) 188 watt hours per day. Multiply that by 365 days = 68,620 watt hours....also known as 68.6 kilowatt hours.
In my home market of Raleigh, NC, 1 kilowatt hour costs $0.095. (To find out how much 1 kilowatt hour costs you, just check your energy bill.)
Therefore assuming 4 hours per day for a year, you'd save (68.6 x .095) $6.51 per year per bulb replaced. Considering the bulbs cost only $2-$3 these days...you get your payback in just a few months.
Here's a quick spreadsheet to help you figure your payback.
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