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light bulb goes off in one's head
/lˈaɪt bˈʌlb ɡoʊz ˈɔf ɪn wˈʌnz hˈɛd/
light bulb goes off in one's head
01
used to say that someone suddenly understands something or gets an idea
Idiom
Examples
A light bulb went off in her head during the lecture.
light bulb goes on
01
used when someone suddenly realizes, understands, or thinks of something
Idiom
Examples
A light bulb went on when she saw the pattern.
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