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.

QL Design is an abbreviation of Quality Lighting Incorporated. They were one of the pioneers of architectural outdoor area lighting along with LPS lighting. They were the first company to conceive the high-mast luminaire in 1965. From the 1980s to the 2010s, they were one of the prime leaders of their category. They were owned by the JJI Lighting Group before Genlyte acquired the entire group around 2008. By the mid 2010s, Quality Lighting slowly died off due to other Genlyte brands taking up the outdoor lighting segment (Stonco, Gardco, Hadco, Lumec, Day-Brite, Wide-Lite, etc.). By 2020, Quality Lighting was dead.

An honorable, yet sad, death, to say the least. I do wonder if Quality Lighting Incorporated still existed today and produced LED fixtures, whether or not the fixtures would live up to the brand name.