Thats a great question friend. I haven't thought about it before and it does make sense. Those black lights emit Ultra violet light which is not visible to the naked eye. It falls outside the range of visible light.
So it would stand to reason that exposure to this kind of light would help improve your ability to see past the visible spectrum and into more psychical areas. That is after all what the third eye does and is for, to perceive that which cannot be perceived by the 'five senses'.
Have you (or anyone) got a black light?