消灯（しょうとう、shoutoう）
- lights out

The Japanese word 消灯消灯 means "lights out," "lights off," or "turning off the lights." It refers to the act of extinguishing or switching off lights, typically at a specified time, such as in a school, hospital, or military barracks. It can also refer to the moment when the lights are turned off.

⚫︎ 学校は午後9時に消灯します。 Translation: The school has lights out at 9 p.m. ⚫︎ 消灯時間になりました。 Translation: It's lights out time. ⚫︎ 病院では、患者さんは22時に消灯します。 Translation: In hospitals, patients have lights out at 10 p.m.

⚫︎ You would use 消灯消灯 when talking about the scheduled time for turning off lights, especially in organized settings. ⚫︎ It can be used in announcements, instructions, or simply to describe the event of turning off lights.

⚫︎ 消灯消灯 is primarily written in kanji. ⚫︎ Reading: しょうとう ⚫︎ It is not typically written in katakana.

There are no direct perfect synonyms, but related phrases might include: ⚫︎ 電気を消す (denki o kesu) - To turn off the lights/electricity. ⚫︎ 明かりを消す (akari o kesu) - To turn off the lights/light. ⚫︎ ライトを消す (raito o kesu) - To turn off the light (loanword)

⚫︎ 点灯 (テントウ) - Turning on the lights; "lights on".

寮では、消灯時間が決められています。 ・Translation: In the dormitory, lights-out time is decided. ・Explanation: This sentence describes that there is a specific time for turning off the lights in a dormitory.

看護師さんは患者さんに消灯を促しました。 ・Translation: The nurse urged the patient to turn off the lights. ・Explanation: This sentence describes a situation where a nurse encourages a patient to turn off the lights.

The word 消灯消灯 is composed of two kanji: ⚫︎ 消 (shou) - meaning "to extinguish," "to put out," or "to turn off." ⚫︎ 灯 (tou) - meaning "light" or "lamp." Therefore, 消灯消灯 literally means "extinguish light" or "put out the light."