Or at least I think they are. Accidentally hit something when I went to move, and all those colored rings popped up. I'd like to have them off again. You can see what I mean in the image there.

http://s1342.photobucket.com/user/Faeller/media/gizmothings_zpsed81ca97.png.html

Those are the light radius wires. They can be toggled with "L".