I’ve searched my mind out and can’t seem to find what seems like it should be pretty straightforward.
If a light is on for a given amount of time, I want it to notify me, not turn the switch off. I see how to turn a switch off if it’s been on for some amount of time but, just in case someone is still in the room, I don’t want them to be left in the dark. I just want a notification so the person who forgot to turn it off, if not still there, gets a reminder to turn it off.