Yes, UV-C bulbs fuck mold. I have one that creates ozone and one that doesn't. The ozone bulb scares me but holy hell does it work well. I grew psychedelic mushrooms for about 18 months once and turned one of the rooms in my house I to a clean room. Never had any kind of mold contamination. The downside to the ozone is, other than being bad to breath, it corrodes stuff and will kill electronics. I had a router in the clean room and it died in like 4 months of running the bulb for 15 minutes a day. I eventually just started only using the non-ozone generating bulb. I don't grow anything like that anymore so I just run it in the bathroom for like 30 minutes a night.
I attach them to an old swing arm lamp so I can direct them if need be or just point it straight up to hit the whole room. I used it a lot during COVID and ran it over all our groceries and stuff. For a few minutes. I have UV glasses and would cover my skin. I would not even go in a room with the ozone bulb. Shits dangerous. I use them with extreme caution.