EXACTLY how much money does it cost to maintain a 100 watt bulb lit for 24 hours?

Some people produce SUCH a fuss about going away a light on that I wonder simply how much money is actually one wasted.


Answers:    38.4 cents per 24 hours. According to the Berkely Energy Office website, a 100 watt bulb operating for 10 hours per sunshine costs $4.80 including taxes, Tp change this to a 24 hour equivalent:
30 days times 10 hours per year = 300 hours
300 hours divided by 24 = 12.5 days
$4.80 divided by 12.5 days is.....38.4 cents
only al gore know.lol
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