Far UV Krypton disinfection lights can be used within any budget to increase the safety of occupants of any environment. Since the immune system of any occupant of space is unknown, the goal is to reduce the viral load as much as possible. Krypton disinfection lighting is the only practical, safe and effective air AND surface disinfection method that can be used while space is occupied (when a contamination event can occur: someone breathes, talks, coughs, or sneezes or touches something).
It is unknown what amount of contamination is required to make any individual vulnerable to becoming infected with COVID-19. Krypton disinfection lighting has been proven to be able to reduce viral loads by up to or over 99.9%. However, if human exposure risk does resemble a normal bell curve, even smaller amounts of viral load reduction in occupied environments could make a significant difference.