UV lights come in a variety of different wavelengths, but not all are equally effective at disinfection. Researchers tested a number of commercially available lights to find the best.
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Does UV Light Actually Disinfect and Kill Viruses? – Beckman Laser Institute
In the media: UV Light Wands Are Supposed to Kill Viruses. But Do They Really Work?
Specific UV light wavelength could offer low-cost, safe way to curb COVID-19 spread, CU Boulder Today
Does Covid-killing UV tech work?
No, you should not use UV Lamps on your hands and skin
You asked, we're answering: Your top questions about Covid-19 and vaccines
Ultraviolet - Wikipedia
Does ultraviolet light kill the coronavirus?
Far-UVC light (222 nm) efficiently and safely inactivates airborne human coronaviruses
Far-ultraviolet LED designed to kill bacteria and viruses efficiently without harming humans
Scientists Consider Indoor Ultraviolet Light to Zap Coronavirus in the Air - The New York Times
Upper-Room Ultraviolet Germicidal Irradiation (UVGI)
Ultraviolet germicidal irradiation - Wikipedia