With the implementation of controlling the brightness of our room's light in 3.1, I have found a variety of ways to exploit this new feature to my advantage. Consider mood lighting as one of them. With a specific light source placed in a very specific location, one can render a said location with a certain "glow" that can really give a subtle yet elegant feel to any room. Consider the two pictures below of my room in our FC manor.
Before without application of mood lights
https://scontent-sea1-1.xx.fbcdn.net...af&oe=56AF60FA
And then with the addition of mood lights
https://scontent-sea1-1.xx.fbcdn.net...d3&oe=56EB233D
The application of this technique is limitless, in creating a focal point for any room. Try it out! I love it a lot!