This set off a little light bulb in my head.

FORBES: Campus Censorship Breeds Societal Dysfunction

To me that kind of raised a light bulb in my head that when I got in the jury room I wanted to read the minutes of that meeting myself.

BBC: Apple versus Samsung: Jury foreman justifies $1bn verdict

They can happen in the middle of the day, night, or even during a traffic jam, the "aha" or "light bulb" moments in our lives--those thoughts of clear brilliance where the proverbial light bulb appears over our head.

FORBES

Wondering what to do, ferreting in his bag, he found a copy of the Declaration of Independence he had been given at the grocery store, and a light-bulb pinged on in his head.

ECONOMIST: Michael Hart