Don,
You are also wrong
Quote:
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Note: In case you don't know, there is NO SUCH THING as "FDA quartz" (i.e., closed quartz) vs "Non-FDA quartz" *(i.e., open quartz).]
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Ask Cosmedico, ask Philips, Ask Heraeus, Ask Radium.
There is a difference. Non-FDA quartz has too much UVC in it. (UVC to UVB ratio is .003 by FDA regulations of UV emitting lamps) FDA Qaurtz does not allow UVC. There are additives added to the quartz to make it block all the UVC & a bit of UVB.
Yeah, there is no actual term of FDA quartz, however if you test the lamps that are "open" quartz you will see that they don't meet the requirments of the FDA. If any manufacturer is stupid enough to put UVC producing lamps in thier units, then so be it.