Over at Concert Poster.org They just put a post on Blacklight Posters, They have some cool posters displayed there.
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Personally, I like the way blacklight posters luminensce and create a sense of the
Otherworldly so common in psychedelic experiences. I also like the work of Alex Grey
and Neil Hague. ( Tool and David Icke respectively)

Age of Aquarius Blacklight Poster

Psilocybin Mushroom poster

Blacklight Marijuana Poster