I don't have a motion sensor in my bedroom, I didn't want lights going on when my Wife is sleeping.

I do have an old phone in a dock next to the bed though. It has Wall Panel and Home Assistant apps on it, and I'm using it as a bedside clock with smarts.

Wall panel has a feature where the screen turns on when the camera detects motion. I decided that since it only does this when I wave at my clock, I may as well put it to use. So I looked at the HA app sensors and found the phones activity.

I've then made my most out of the way light in the bedroom trigger when the screen is on.

During the day it then trips back off when my rudimentary Wasp In a Box automation works out the bedroom is empty (it adds a number when my Hallway motion is tripped and takes one away when it's tripped again, also uses other motion sensors to work out whether we are entering or leaving the room). At night it waits 5 minutes then turns off.

So now when I enter the room during the day and it's dark (HA app can display lux) my light turns on, at night when I need a wee I can just wake up my bedside clock and pee, get back into bed and the light shuts off.