How much does it cost to run a normal 100W light bulb? Per hour and the whole life of the bulb (please specify the life span you are using).
How much does it cost to run a 25W (equivalent to 100W of a normal bulb) energy saving light bulb? Per hour and the whole life of the bulb (please specify the life span you are using).
Please use the rate of 9.8 cents/Kw-hour.
If you have any other ways to compare these two bulbs in terms of money, please do share.
2007-01-30 15:01:42 · 5 answers · asked by Anonymous in Home & Garden ➔ Maintenance & Repairs
kw-hour is kilo-watt each hour
100 watt will use .98 or 98% of a penny or $00.098 each hour
25 watt will use .25 or 25% of a penny or $00.025 each hour
no bulb lasts as long as the life is, so comparison is a guess
say each bulb lasts 6000 hours one costs 40 cents, the other costs $2.50
100 watts = .098 x 6000 = $58.8 25watts = .025 x 6000 = $15.0
2007-01-30 15:24:18 · answer #1 · answered by T C 6 · 1⤊ 0⤋
Excellent question! In answer to your question though, I too have wondered if there is a trade-off. How damaging are the bulbs to the environment when they ARE finally disposed of? Just a point about choosing your energy saving lightbulbs. I noticed in the shop when buying my ones that the different brands offer bulbs that use the same 8W or 11W but there is a difference in the intensity of each brand/model. Look at the "Lumens" the bulb is rated at. The higher the Lumens, the more light you'll get for your Wattage and for your money. I have 11 of them in my apartment. I now pay 40 € for a two month electricity bill and that is with the microwave, washing machine, computer and TV. Most of my friends pay something like 100 € or 120 €. And since October, I haven't had to change any bulb yet. I think they're worth it (as long as your electricity supply is stable and you don't have to keep buying new ones.) What will Kenner do for their toy ovens that cook using the heat from an incandescent light bulb? They make such great Devil's Food Cake!
2016-03-28 21:45:53 · answer #2 · answered by ? 4 · 0⤊ 0⤋
The easiest way to do this is to check the boxes for average longevity and comparative cost. They are usually both listed.
If you must do the calculations, use the average life in hours divided by 1,000 multiplied by the stated wattage times $.098
2007-01-30 15:09:15 · answer #3 · answered by MT C 6 · 0⤊ 0⤋
complicated issue. search in google or bing. this can assist!
2015-04-05 19:50:59 · answer #4 · answered by Debra 2 · 0⤊ 0⤋