Interesting article.
https://ac-today.com/independent-lab-validation-study-fresh-aire-uv-systems-inactivate-99-99-of-sars-cov-2-virus/
Quote99.99-percent coronavirus inactivation in less than two seconds of exposure to Fresh-Aire UV's germicidal UVC 254-nanometer light systems
I have the APCO-X. Nice and simple to install. Has a lifetime carbon filter and a three-year bulb.
I saw this study earlier in the week and I would have thought you're getting a second or less of time in the UV light.