Yes, black lights are where it's at. I have one semi-small black light and two diff bulbs. They all congregate around and to the side of this big mess I made with glow in the dark paint on my wall. Really gives that glowing-chill look.
I also have all of my walls painted/spray painted with crazy designs and cartoonish things, one wall with red and orangish christmas lights hanging over it, and glow in the dark paint all over my ceiling.
And as an alternate mood, I make a shitload of candles. Less of a spacy mood and more of an alert, down to earth vibe.