How long does it take for ultraviolet rays to achieve disinfection effect

The ultraviolet disinfection generally lasts for half an hour to one hour to achieve the effect of sterilization.
Nowadays, ultraviolet lamps are widely used to disinfect space, appliances and other articles. However, it should also be noted that the time for disinfection with ultraviolet light should not be less than half an hour, otherwise the effect will not be achieved if the sterilization is not complete, and the continuous exposure time should be at least half an hour to one hour. If the disinfection space is too large, the irradiation time needs to be extended. Items that need to be disinfected should not be covered by things to avoid ultraviolet radiation. During disinfection, people and pets shall not move within the irradiation range to avoid burns to eyes and exposed skin.