noun, noun or participle which takes 'suru', intransitive verb
turning off the lights; lights-out
Commonly used for scheduled lights-out in institutions like hospitals or dormitories, as well as general turning off of lights. Often used as a suru-verb.
See also: 点灯
病院の消灯時間は午後9時です。
Lights-out at the hospital is 9 p.m.
The last person to leave the room, please turn off the lights.