I have controllable RGB lights around the ceiling. It's simple but effective for setting a mood. They can also be dimmed, or put to certain modes, like fading from one colour to another, flashing, etc. Mine also have a setting where they react to music, but sadly that doesn't work very well at all imo.
I should also note that aside from the newest generation, they cannot give a pure white light; you will always see the colours of the individual LEDs in it. So if white light is your main goal, stay away from them.