student asking question

Why did she say "lights out" not "lights off"?

teacher

Native speaker’s answer

Rebecca

In general, native English speakers say "lights out" when turning off lights, especially before bed. It's common to tell children "turn the lights out" or "lights out at 9pm" to tell them to go to bed. Lights out/lights off have the same meaning, but like I said it is common to say "lights out".

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