I use fluorescent black lights for my ghosts. I try to place the light between the ghost and the viewer, and shield the the light from the viewer. I have used cheap 2 light 4' fixture and a couple of 4' tubes from home depot, which will affect a pretty large area. paint the fixture flat black. I have also used single tube black lights from Spirit and made my own shields. with the 20% off coupon its a pretty good deal.
