MLA Citation: Bloomfield, Louis A. "Question 187"
How Everything Works 22 Jan 2018. 22 Jan 2018 <http://howeverythingworks.org/print1.php?QNum=187>.
187. Why does a refrigerator light last so long?
The life of an incandescent bulb depends almost exclusively on how many hours its filament has been hot. Since the bulb in a refrigerator is only on for a few minutes a day, it lasts for many years.

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