You may have seen a picture of a QL Design 114-24B in my gallery. If not, see it here: https://www.lighting-gallery.net/gallery/displayimage.php?album=8815&pos=32&pid=255280
After some searches on the topic, I could not find any relevant information on what happened to the brand, despite countless brochures for their various fixtures being available on Scribd. So, what happened to the brand?

Yeah, heaps of companies just silently ceased operations, perhaps @LightsoftheWest will know?

Yeah, heaps of companies just silently ceased operations, perhaps @LightsoftheWest will know?

Quite possibly. It is rather annoying that we are in the age of information yet some information regarding things that have happened recently is hard to find.

Well said!

Check out the Chamber of Commerce and the Trademark Bureau websites/archives of the country where that company is from.

The Chamber of Commerce has information on whether a company still formally exists or not, the address where it's registered (which may help you find more info) etc. If it doesn't, the Trademark Bureau can point you in the direction of the new trademark owners, which in turn may be the owners of the intellectual property (like lamp designs, formulas and such). Or if the trademark is lapsed, it's likely that it's all gone or just in the private ownership of one of the former company owners.

I couldn't find QL Design on the chamber of commerce, but I did find on the trademark bureau website that the trademark was canceled in 2000.