So what does and doesn't function when the tower has no power? I saw it mentioned that the elevator will still run, and apparently the dormitories keep light because of a backup generator of some sort, so is the rest of the tower in non-functional eternal night or are there other exceptions?

Do NPCs and stuff still do their jobs in the cafeteria or something despite the outage and... I guess I'll ask this in case it ever comes up, how capable are they at defending themselves from monsters?