Thanks for y’alls posts!
UVC light
https://www.ledsmagazine.com/directory/led-packages/uv-ir-leds/press-release/14173253/seoul-semiconductor-seoul-viosys-and-setis-violeds-technology-proves-999-sterilization-of-coronavirus-covid19-in-30-seconds
Remember President Trump’s phrase about the virus, something like: “disappear in a flash of light”?
Good connecting of dots.