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light bulb moment

British  

noun

  1. informal a moment of sudden inspiration, revelation, or recognition

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of light bulb moment

C20: from the cartoon image of a light bulb lighting up above a character's head when he or she has an idea

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

"The filters would be very good insulation, and someone had a light bulb moment and probably bought this as scrap off their manager," he said.

From BBC • Mar. 25, 2026

But it was a light bulb moment with the swing that made the most profound change.

From Los Angeles Times • Jun. 30, 2025

Did you have a light bulb moment, an experience where you said, "Oh, this is not normal?"

From Salon • Jun. 3, 2024

“It was like a light bulb moment for me,” Ms. Hughes said.

From New York Times • Feb. 12, 2022

A light bulb moment for a lot of my actors is, I share Russian singing and music, which reflects the speaking rhythms.

From Slate • Jul. 24, 2021

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