5 Progress P5642-31 or P5644-31 lamps mounted together, maybe? First one shines light downward, second one both up and down.

You may be right! Thanks lee676. ---Hope this gets through ok. The GW site is kind of broken for me this morning. They must have packed everything into the Houzz moving boxes.---

This is where those lights are from: Hampton Design

You may be able to contact them and inquire.

Yeah, I'd call/write them and ask, and imply you'll help spread word of their services so they'll have an incentive to look into it.

Given the big, elegant homes they have as clients, I was expecting their offices/showroom to a be in some trendy modernist commercial building ground floor in an urban locale. Not this:

{{gwi:2139558}}

Yes, that is where I picked up the image! Thanks. I'd wandered through so many forums that evening, I didn't have any idea where I had found the photo.