Let what run for how long? An ozone generator isn't a static thing, until you name a device. Most are gonna be plate driven devices (which then breaks down into surface area of the plate and power drawn) although in theory vaporized mercury lamps also create ozone.
Ozone use in industry? Think NFL teams during covid with automated sterilization of their locker rooms at night. Think duct cleaning services for laboratories or high-risk healthcare settings.
Not all UV use is going to be ozone use, ozone is a distinct layer of applying UV, where in the bubble of ozone gas UV light is superreflective, whereas this is not the case outside of the bubble. So, folks use ozone bubbles saturated with UV photons to "push" the bubble through space and apply UV through said space. For example, imagine you have a UV bubl....but you need to sterilize the ducting 100 yards from an entry point.....that bulb is not going to get UV photons to that point due to inverse square laws and such (unless you have the photons in ozone or walk the bulb 100 yards through ducting).
Outside of cleaning ducting I cant think of anywhere in my rooms I would be purposefully applying ozone. When I was younger I had a scent mixer with a two stage system and an ozone mixer inbetween. Even that was like 5 seconds on, 1 minute off, with constant mixing and a pre and post fan to guarantee your pressure spec to keep the ozone flowing one way...
Ozone is mostly going to be for shoring up weaknesses with UV sanitation. So things like spotting, shadowing, dimensionality, and so forth. UV light is known to damage DNA, in a near perfect collision due to photon size at this wavelength. So, take caution accordingly. Some real ultimate-level clowns on this site in the past have told folks to put these devices in their residential hallways (cancer in 15 years, bet every snip and bean i have on that one). Is it safer than using chemicals? Possibly. Like Yan, I have solutions for cleaning my tent. Even if I were to use ozone, it would be because some nasty stuff happened in that tent and would follow a manual cleaning anyway. Ozone flushing a tent would be like right next to 'ah throw that canvas away and grab a new one' in plans for me