The longest wavelength isn't 222, that's the peak wavelength. KrCl excimer lamps produce a relatively narrow spectrum as is: https://pubs.acs.org/doi/10.1021/a

The longest wavelength isn't 222, that's the peak wavelength. KrCl excimer lamps produce a relatively narrow spectrum as is: https://pubs.acs.org/doi/10.1021/acsphotonics.2c00041 https://pubs.acs.org/doi/10.1021/acsphotonics.2c00041 If it turns out we need it to be even narrower, we could put filters on them.