A homeowner replaces a typical incandescent bulb that draws 100W with an energy-efficient fluorescent bulb that produces the same amount of light but draws only 18W. The bulb was in an outdoor fixture that is on every night for 10 hours. a. How much energy per year does the new bulb save? b. How much money per year does the new bulb save if PG&E charges P 7.50/kWh? c. What if the owner replaced 10 of the same bulbs, how much would he save?
A homeowner replaces a typical incandescent bulb that draws 100W with an energy-efficient fluorescent bulb that produces the same amount of light but draws only 18W. The bulb was in an outdoor fixture that is on every night for 10 hours. a. How much energy per year does the new bulb save? b. How much money per year does the new bulb save if PG&E charges P 7.50/kWh? c. What if the owner replaced 10 of the same bulbs, how much would he save?
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A homeowner replaces a typical incandescent bulb that draws 100W with an energy-efficient fluorescent bulb that produces the same amount of light but draws only 18W. The bulb was in an outdoor fixture that is on every night for 10 hours.
a. How much energy per year does the new bulb save?
b. How much money per year does the new bulb save if PG&E charges P 7.50/kWh?
c. What if the owner replaced 10 of the same bulbs, how much would he save?
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