Following the global pandemic, schools and colleges sought chemical-free methods to minimize germ transfer in high-traffic areas.
: Research in 2021 explored safer, "near-UV" spectrums (400–440 nm) for continuous environmental hygiene in classrooms while people were present. ultraviolet schools ml 2021
: Specifically using the 254 nm and 275 nm wavelengths, these devices were deployed to sanitize air, surfaces, and water supplies. Following the global pandemic, schools and colleges sought