re: #89 Nojay UK
Had to nerd out on the glass when he said soda glass won’t pass UV-C, but borosilicate glass (he said Pyrex) might; neither of thoss glass types will allow UV-C transmission; Ok, the Boro may allow a little. I always used quartz in the lab to allow UV-C transmission, but it does turn out some specialty glasses do, meaning those lamps aren’t quartz, and therefore are affordable.
I just answered a question no one but me cared about.