You may think you know that you need to shield your eyes but if running the
source semi-continually then YOU REALLY HAVE TO SHIELD YOUR EYES, that
their days may be long on the face of the land.
I left a substantial wattage UVC germicidal lamp running in my workshop
doing UV exposure tests on some portable light housings  while I was in
China. The light was well enough shielded with shielding that no passing
eyes were at risk, and I own the only pair of eyes usually at large in my
workshop. While I was away I wanted to check test progress and called my
wife and asked her to check results. My wife is careful, methodical and
used to following technical instructions properly. (She once ran a small
scientific lab - different discipline, same orderliness needed).
I gave her written procedures and suitably graphic warnings via email. She
carried out the required check and ended up with both eyes  very nicely
burned internally to the extent that she had to keep BOTH eyes covered with
pads for the better part of a week. (She could lift a pad to peer out of
the corner of while walking around the house but this was too painful to do
unless essential for navigation).
I was in China throughout - and duly popular :-).
I had carried out the same check many times (before and since) with no
problems.
I checked the instructions subsequently and they were adequate and gave
warnings & clearly detailed the risks
If my wife could get trapped while following good instructions a majority
of others could too.

I suspect in her case that high angle UV hit her glasses and refracted off
the bottoms of the lenses as they curve into the frame.
Whatever it was it worked "well" *.


____________________

A combination of a UV germicidal lamp (can be small and cheap) _ a
"backlight" bulb + a mix of UV LEDs will allow you to mix an match
reasonably well.

It is unlikely that you need "full spectrum" UV and, if you do, you would
need to define the term tightly enough to ensure it met the need.

The closest you are liable to get to full spectrum this side of the
atmosphere is sunlight supplemented with UVC from a germicidal lamp.


__________________

* Bonus: Hospital found she had retinal tearing which was at risk of major
complications. Burned eyes served to get her examined in time. All things
work .... .



            Russell
--=20
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