I have a homemade 100W Mercury "Blacklight" hand held fixture made from a ballast,reflector,handle,switch,and a GE filtered BL mercury bulb.Works very well.Bought at a swap shop for 20 bucks.

BLB "HPS": Wasn't it just a pulse start MV (or MH), only maybe designed to run on the HPS ballast (so therefore bear the HPS ballast code designation)?

I could see a MH BLB, but in retrospect, I see your point over HPS not producing enough UV, maritime man. I'm pretty sure I saw the HPS black light on a Chinese site, do it may just be mislabeled. Don't believe what you see I guess.
Couldn't you make a HPS BLB with an outer envelope of woods glass like an incandescent BLB lamp?

An HPS with exploded arctube looks black, though it is silver-black and not BLB-like black

I have 1 BLB Mercury lamp 125W, and 3 BLB Fluorescents 36W T8. Unfortunately you can get the BLB fluorescents here only from very cheap and low quality manufacturers, the importers of the good lamps dont want to bother with importing a lamp for which the market is so low

Couldn't you make a HPS BLB with an outer envelope of woods glass like an incandescent BLB lamp?

That wouldn't emit anything...
The incandescent does emit some of the UV, although the efficiency is really very low. But the HPS emits way less than that (it just runs way colder, include the sodium arc core).

The Chinese offerings (on Ebay, AliExpress, just everywhere...) tend to suffer from combination of two problems: The very limited technical skills of the sellers and theis very limited knowledge of the English language (many just use Google). And in that I would not be surprised, when a term "discharge lamp" gets turned into "HPS lamp" (because he finds somewhere e.g. a term "Lamp for streetlights")...

Yes I see your point. I have bought different value resistors from Chinese vendors on eBay and they used the same resistor as the stock photo for each individual listing. Thankfully, they got the values correct.