Turn the light off as you go out.; Please switch off the lights when you leave.

出门时请随手关灯。

《新英汉大辞典》

Would the last person to leave Havana please switch off the lights?

最后一名离开哈瓦那的人，请关灯？

youdao

Please switch the lights off as you leave.

你离开的时候请把灯关了。

《牛津词典》

The street lights switch-off will be rolled out across the rest of Dorset in the next year.

BBC: Swanage street lights switch-off to save ?150,000 a year

The Kremlin due to switch off its lights at 16:30 GMT along with 90 other landmark buildings in Moscow.

BBC: Sydney dims down for Earth Hour climate change protest

Some residents in Dorset are calling on the county council to turn street lights back on at night time claiming the current switch-off is "dangerous".

BBC: Councillor Robert Gould, from Dorset County Council