Just some test shots using a Phalaenopsis ("moth orchid") as a target.
Nikon D70 (unmod.), High Power UV flash, EL Nikkor 105mm, f8, 1/180sec, ISO400
[click on image to see a larger one]
VIS:

UV using Baader U filter:

FL using XCUT2 filter:

FL using Nichia 365nm UV LED (for comparison):

Stay tuned, more will follow on that fascinating subject...
More info on this very interesting field may be found on my site
http://www.pbase.com/kds315/uv_photos