I don't think UV light is necessarily used to
sterilize , even if that's possible .
many many years ago i worked
in a Univ. Infectious disease Lab.
back then , the dept. made all or most of the
petri-dish medium to grow what was needed in the
Univ. Hospitals ID identification lab
what's were your ' cultures ' go to sort out.
in the room where all this got done , and much more
when the door was shut at night , banks of UV lights came
on. not a few , one or two , but like arrays of fluorescent like lights on
the ceiling. when the door was opened
they turn off . im sure thy were not looking
to have a sterile ' kitchen' in the morning
but one w less chance of contamination when making
media ( the gell the bottom of the peri-dishes )
if something needed sterilizing
( liquid media in flasks )
it got autoclaved. im sure the liquid
poured into the already sterile plastic perti dishes
had to have been autoclaved , then cooled
before the ' pour '
and indeed , the room was a big kitchen .
