The recent pandemic spawned a flood of "UVC" disinfection lights. Many of which only emit UVA like a blacklight, which has no sterilizing effect.
In this video, I test a handheld device claiming to emit UVC. I also look into how much UVC would be reflected back at you when using a handheld UVC sterilizer...
Is a mirror the best reflector for UVC?
Find out in my latest video, where I also measure the spectrum of sunlight!