noun
lights-out time
Refers to the designated time when lights must be turned off, typically in dormitories, hospitals, or other institutional settings.
寮の消灯時間は夜10時です。
Lights-out time in the dormitory is 10 p.m.
消灯時間を過ぎると、廊下の明かりも
After lights-out time, the hallway lights also go off.