There were some extremely interesting LED based UV2 products on the market before COVID19.

I would recommend looking into investing into xylem and other companies that are going to be making this technology a reality.

There is a huge number of companies in the LED space. Since the technology is well known, I suspect that it will be difficult for any company to get a patent.

It still baffles me that there was not a large number of companies hitting the floor with UVC disinfectant products.

I looked at the Xylem Web Site. It looks like their main focus is on water treatment. My local store has a water dispenser that includes an UVC light which is a fun addition.