How much does it cost to leave a light on for an hour?

+1 vote
asked Oct 11, 2018 in Other-Home/Garden by Emili88 (180 points)
How much does it cost to leave a light on for an hour?

1 Answer

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answered Oct 11, 2018 by aamir (490 points)
If you're using the new Led light bulbs then it costs not even a half penny to leave your light on for an hour.

I have light bulbs that are led bulbs and they use 9 watts of electricity per hour and I leave them on for 8 hours per day most days.

So in 8 hours that 9 watt light bulb would use 72 watts of electricity in one day and if we take that 72 and times it by approximately 30 days in a month the led light bulb would use 2,160 watts of electricity per month.

Electricity costs me 10 cents per KWH so leaving that light bulb on for a month for 8 hours per day would cost me around $0.22 which is very little money.

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