Could it be a mall? definitely looks like a mall

The arm setup makes me think this was taken at a former Kmart, but the building tells me otherwise. Maybe a former Ames department store?

Eric, what's your eBay username, if you don't mind me asking? I'd love to buy some of your "excess" lamps... 

I was wondering if you bought that one...no, I'm not the seller.

Do you want clear or phosphored?

A few minutes after posting this I found a coated 400w Westinghouse Lifeguard for a reasonable price. I am still open to offers though.

Another possibility is that Iwasaki also stopped making the arc tubes and just buys in the complete lamp from another supplier.

I would expect that because EYE probably make their own stuff to quite high standards considering stories from other members about how high quality they are.

True as well

believe EYE has moved sourcing / production to China for a lot of there "international" gear and now lamps
I have seen LED fixtures from them from China for 120V markets

https://www.lighting.philips.com/api/assets/v1/file/Signify/content/LP_CF_XUMCOL52_EU.en_AA.PROF.CF/Localized_commercial_leaflet_Blue___52__TL_TL_D_en_AA.pdf

Here's the leaflet of a random color 52 tube. Indeed, jaundice is one of the applications, but probably also just decorative blue light.

If you hook it up to a neon sign transformer, it will glow deep red (neon) or sometimes purple (argon). You can use it as a decoration, moodlight or nightlight based on brightness.