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Suppose your electric lights use 500 watts per hour and average four hours per day, every day for one year. How many kWh per year does this represent?

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  1. 15 July, 10:33
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    First, convert watts to kilowatts.

    500w/1000 =.5 kW per hour

    .5*4 hours = 2kwh*365 days = 730 kWh

    The answer is 730 kwh per year
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