No UL listing. But probably good enough for converting your warehouse into an artist’s colony and performance space anyway.
Purchased two sets a couple months ago to replace an aging lighting system on a Christmas tree lot. The old system had about a 1/3 of the sockets, using conventional bulbs. Current draw taxed our power supply pulling around 29 amps. We used LED bulbs in the new strings going from 50 bulbs to 164, and still cut our current draw in half at 14 amps. The lot was extremely bright. This was a great purchase for us, and I would highly recommend.