WARNING: JTL Monolights are DANGEROUS!

FYI: I recently discovered the hard way that the three JTL monolights
(Versalight series, 300 and 800) I owned are ELECTRICAL HAZARDS.
CAUTION: you may get shocked quite severely if you use these lights. I
found this out by getting a good shock when doing a portrait session
in a studio with a concrete floor. I was wearing shorts and knelt down
to get a better angle on the subject and as soon as my knee touched
the floor, I felt a strong electrical current run through my arms via
the camera. I measured 85 volts AC between the sync cable outer
connector and earth ground. THIS IS NOT NORMAL!! I tried contacting
the JTL company twice but did not receive a response. The same problem
was exhibited by all three lights, so I don't think it's an individual
defect. Instead, it seems to be a design flaw.

Yes, you might say I was an idiot for wearing shorts and shooting
portraits in a room with a concrete floor, etc. I agree, and I'll not
do that again. However, I recently took delivery of some new
monolights (from Calumet) and they do not exhibit this voltage
problem.

-John