Good article for anyone freaking out about the dangers of Far-UV tech. Covid, not surprisingly, is FAR more dangerous. The dangers of Far-UV at 222-nm are basically nonexistent. It's an expensive but viable way to protect oneself in the plague infested waters we are all wading through. "Comparing this typical spectrum of an unfiltered KrCl lamp with the oxygen absorption of Fig. 1, one will find that there is an insignificant, but detectable amount of radiation below 200 nm that can produce ozone. That means that there is a potential that ozone can be generated by this kind of lamp. However, the contribution of the main 222-nm wavelength to the ozone generation is usually negligible."