Band-Pass Filtered AP-UVGI using Far-UVC (222 nm) is on orders of magnitude safer than UVGI using UV-C (254 nm – 280nm). UV-C will begin to negatively affect the skin and eyes of a person with irradiation of more than 6 mJ / cm2, while Far-UV at irradiation of 5000 mJ / cm2 does not cause any damage or even redness.

Long-term Effects of 222-nm ultraviolet radiation C Sterilizing Lamps on Mice-Susceptible-Ultraviolet-Radiation