My $0.02: Since the hanging lights are so central to the scene, I would move away from making the globes emitters. Take a little extra time and model some actual light bulbs with fillaments and make those emitters shining thru the bulb glass as well as the globe’s glass. This will make a huge difference, especially if you take the time with the material to make it partially frosted or something like that. The in-ceiling lights are okay as is, tho.
You might want to have some exterior lighting shine through the window, too. Either an emitting plane or close in your room and set up a sky. Indigo’s camera defaults (I think) to a auto-light-balancing algorithm (like that on your digital camera.) Thus, when you introduce exterior lighting, you may have to adjust the power of your inside lights to regain the proper balance. Sounds like a pain, but the results are worth the effort, IMO.
Coming along great, tho. Don’t you just love the natural-looking shadows, etc?