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What does SAL 99 mean? I have been reading that 6.4 mJ/cm2 is needed to kill 99% of ssRNA viruses. That's the type Covid is.

I have heard and read a wide range of exposures for killing Covid-19 and SARS. I have been using this study, which isn’t perfect but seems close to our application: Inactivation of viruses on surfaces by ultraviolet germicidal irradiation. - PubMed - NCBI They say, “For 90% viral reduction...

I agree. Buy bulbs that publish their specs. GE does this for their germicidal bulbs like this one. https://consumer.gelighting.com/catalog/p/11077

Maybe throw some insects in there? Let us know how you test it. I'd like to try something too.

It is pretty dangerous and you don't want to be exposed to it. UV-C light breaks down DNA and RNA in viruses, bacteria and in you. If you use it, you want it in a sealed chamber so no light leaks out.

This is false. Please provide your source. I bet if you read it closely, you'd see this isn't their recommendation.

I built a UV-C box a few weeks ago. I used two old cabinets I had and put them together. I am putting everything that comes into the house through it. I have a bulb on the lid and one on the floor, a baking cooling tray for setting the items on. I ran power for the lights through the box into...