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15 w * 24 h = 360 watt-hours. [conversion: 360 (w-h) /1000 (w/kw)= .36 kilowatt-hours]
So, .36 times your local electricity supply and delivery rate (in kilowatt-hours).
For me, supply and delivery of 1 kilowatt-hour is $3.25 (you can find this on your bill)
So, .36 * 3.25= $1.17 to run 15 watt light for 24 hours
Wiki User
∙ 11y ago
Wiki User
∙ 11y agoIt depends on how much your electricity costs.
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To find this answer multiply your wattage by the amount of hours of use. Take that product and multiply it by the amount that your utility company charges you for each kilowatt hour used.
Wiki User
∙ 10y agoThe cost to run a 28 watt light bulb for 24 hours a day will vary on the price per kilowatt hour. A 28 watt light bulb uses 672 watts in a 24 hours period. This comes to 0.672kw hours in that time frame. If you spend $0.15 a kilwatt hour it would cost $0.10 for the day.
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