Robert,

On Mon, 22 Sep 2003 22:42:30 -0600, Robert Rolf wrote:

> What wavelength do UV florescent tubes put out (the
'black light' kind, not the
> UV EPROM erasers)? They seem to be usable for hours at
a time without ill effect
> (at least in disco's <G>).

I think this is a dangerous assumption!  I was at a
party a number of years ago, where one room had a "black
light" fluorescent tube in it, and after about half an
hour I had symptoms of "arc eye" - an irritated, sandy
feeling in the eyes.  It was gone by the next day, but
it was definately a Bad Thing!  It probably depends on
the level of ambient light, because this room was
particularly dark my pupils would have been wide open,
increasing the admittance of the UV compared with a
normally lit room with the same UV level.

I don't know if I'm particularly sensitive to UV but I
wouldn't recommend anyone exposes themselves to it
unnecessarily, even if it's common in discos and such.

Cheers,

Howard Winter
St.Albans, England

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