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Flash on

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Sudden Activation

Refers to lights or devices turning on unexpectedly or quickly.

Illustration for Sudden Activation
We were startled when the room lights flashed on at midnight.
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Automatic Response

Often used for systems that activate without manual input, like sensors.

Illustration for Automatic Response
As we entered the building, the security lights flashed on.
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Visual Alert

Signals attention to something important, like a warning or notification.

Illustration for Visual Alert
The smoke detector's red light flashed on, signaling danger.
Visual representation of the word "Flash on"

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