Thanks for the feedback, guys. The dark walls are actually meant to be a dark marble, but the texture looks muddy from a distance, so I'll change that. The gobo I'm using of all the tree branches doesn't help in that either. And the floating candle there was sloppy of me, can't believe I took a screenshot without noticing that! Apologies for the premature screenshots, there's a lot of work to be done. I appreciate the feedback nonetheless!
Edit- In answer to your question, whether the third and fifth pictures are related, yeah they are. Here are a couple pics from the editor of the layout of the room without the lighting, hopefully looks less confusing
http://postimg.org/image/ao7p7723l/full/
http://postimg.org/image/9htdgf1bp/full/