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light bulb moment

noun
1.
(informal) a moment of sudden inspiration, revelation, or recognition
Word Origin
C20: from the cartoon image of a light bulb lighting up above a character's head when he or she has an idea
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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9
10
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