Jan 7, 2014
12:50:29pm
12:50:29pm
Here is the math for a single 60W bulb at 1 hour per day for a year
60W x 1 hour per day x 365 days = 21900 Watt hours = 21.9 KWH, or about $2.19 per year assuming $.10 per KWH (some areas are much higher than this).
That is for every hour per day. If it is a porch light that is on 10 hours per day, that is $21.90 per year. Start counting how many bulbs are in your house and it adds up quickly. Then add the replacement costs for bulbs that burn out.
That is for every hour per day. If it is a porch light that is on 10 hours per day, that is $21.90 per year. Start counting how many bulbs are in your house and it adds up quickly. Then add the replacement costs for bulbs that burn out.
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