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How much energy do you save per hour if you replace a 60-watt lightbulb with a 55-watt lightbulb ?

Sagot :

AL2006
That obviously depends on how much of the hour the light is turned on.  Neither of them uses ANY energy when it's turned off.

The difference is (60 - 55)  =  5 watts  =  5 joules per second.

If the light is on for the entire hour, then the difference in energy is

(5 joule/second) x (3,600sec/hr)  =  18,000 joules/hour.

Putting it in a more familiar unit . . .

(5 watts) x (1 hour)  = 5 watt-hours  =  0.005 Kilowatt-hour.

If your utility company charges you  25¢ per kilowatt-hour (a very high rate), then the more energy-efficient light bulb saves you (0.005) x (25¢) = 1/8 penny per hour of operation.



Kenna1234
Basically it means that someone will start telling you what to do like say Callie wanted to go to school but but then Kelli said no your skipping and going to the mall with me so like that is controlling
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