This is kind of the problem when players complain about having new stuff added. They see the light orb for houses and they think "What's the problem? Why not just take that and make it work for the entire world!? It's so simple!" and that's not a solution at all. Making the world darker is the simplest part of this entire idea. Many players don't think about the amount of depth and such that would truly need to go into even a "simple" idea to make it decent.
I mean I'm not calling players out for it(at least not in this thread). But it's annoying when players start to get negative about an idea and get their answers from conclusions like that.