UV lamps can thoroughly disinfect rooms

UV lamp irradiation can indeed kill many pathogens, but it is difficult to thoroughly disinfect them solely with UV lamps. On the one hand, the penetration ability of ultraviolet rays is very weak, so the disinfection effect of ultraviolet lamps is limited to the surface of objects that can be directly irradiated, and it cannot penetrate objects to kill internal bacteria. On the other hand, the disinfection effect of ultraviolet lamps is also related to the distance and time between the object and the ultraviolet lamp. For a room, there are too many 'blind spots' in terms of lighting, and it is impossible to completely disinfect it with just one ultraviolet lamp.