Any UV-C disinfection products selling wands or lamps that you can hold, is harmful to the naked eye and should only be used when you are out the room. There have been reports where the wrong UV light used in products has caused bodily harm.
The UV-C LED lights used in OTSAW’s O-RX disinfection robot, are used in a patented process that is the world’s first laboratory tested autonomous robot, achieving a disinfection efficacy of 99.99% within 5 minutes, at a range of 2.5 meters and is able to cover 4000 sq ft of disinfection area in one hour.