As you know, the light turns off at 9pm in the hospital inJapan.
And all of the hospitalized patient have to go to the bed at the same time.

However, I usually go to the bed in the midnight. So I could NOT start to sleep at 9pm in the hospital.
If I would talk with the other hospitalized patient in the day room after turning off light time ( 9pm ), the hospital staff will ask us to go the bed immediately.

So if I will sleep from around 9pm, I would probably wake up around 1am.
Then I would read a book/magazine after turning on the bed side light or watch the contents of YouTube/SNS using by my note PC.

It will be long free time until turning on time( 6am ).