Anyway, it was a neat idea, MizBlackCrow, but doesn't pan out too well in person. I can't really think of when this would be useful.
Ah, but I'm guessing you don't have six year old nieces n nephews. I can see some pretty cool combos of dark colour CK lusters in Blue Ghost on birthday cards accompanied by a $1 UV light making their way through the mail. probably with a vial enclosed.
Thanks for doing the experiment and for the pics.