Individual lighting per level
Aside from private chambers in free companies and apartments, every house has multiple floors. A small has a ground floor and a cellar; mediums and larges have a second floor, ground floor and basement. It'd be nice to toggle which lights were on between floors. Perhaps add a lighting slider for each floor, but my main suggestion is simply turning on, or off, lights per floor, like a switch. Right now, lights are all the same setting throughout all floors.
EDIT:
And/Or to completely remove the lighting fixture from Remodel Interior menu.