I've read many contradictory info about ozone vs UVC light irradiation and cannot come to a conclusion, I am totally confused.
As it commonly known UV germicidal irradiation is very effective against bacteria, virus, molds, but in the disadvantages chapter one can read
Another potential danger is the UV production of ozone, which can be harmful to one's health. The US Environmental Protection Agency designated 0.05 parts per million (ppm) of ozone to be a safe level. Lamps designed to release UVC and higher frequencies are doped so that any UV light below 254 nm wavelengths will not be released, to minimize ozone production. A full-spectrum lamp will release all UV wavelengths and produce ozone when UVC hits oxygen (O2) molecules.
OK, ozone is a bad guy which can cause mutations, cardiovascular diseases and other bad things.
But then I read about ozone magic germicide abilities, that it can destroy all types of bacteria, water treatment, air purification and even cleaning of contaminated soils, and maybe even COVID-19. So why they often advise against ozone?
I've found not so much science researches about comparative efficiency of zone and UVC, for example this which seems very dated (2003), and it says that UV is less costly but not as much universal and effective for water purification as ozone.
This one, more recent, clearly states the idea I also came to:
Vacuum-UV lamps with ozone production were found to be effective for inactivating various human pathogens.
Also I've found many comparative tables like this that confirms better ozone efficiency in all circumstances
We know that UV-lamps with wavelength below 254 nm produces ozone so why not to combine their strengths together?
So where is the truth in all these contradictory sources? How to filter out all those marketing fluff that ozone and UV-lamp sellers put into our ears?
P.S. I saw this question and it covers only part of mine.