This is well known. It has been for along time. To pass this off as something new is a fraud. And there are people out their on the prep forums who have been buying UV units for this virus. I image they are very hard to get at this point.
Far UV-C provides for a safer narrow-band light source in the UV spectrum which poses little to no harm in operation to any exposed humans. The instant-on deuterium excimer lamp which generates this light is not the long available UV generating mercury vapor lamp.
Thanks for the reminder. We just got home and I have to flip our crap over so the UVc light gets all sides. Keys, phones, glasses, etc. I built a box with aluminum foil and have the stuff on racks, but I like to flip them like pancakes just to be sure.