I've seen those pre-rigged blacklight sets at the Depot, but I just figured they wouldn't have enough output to be usable for alt-proc. How long are your exposures for Pt/Pd with this set-up?
I'm getting frustrated using the sun. Just when I think I have things worked out, it's too late in the day to get decent UV. Also, I've bought an 8x10 enlarger, so I won't have a lot of cash to spend on a UV source.