It is usually recommended to ventilate the room for half an hour after the UV sterilizing lamp has been used before you can enter the room. UV disinfection lamps are sterilization lamps that use ultraviolet rays to disinfect water, air, clothing and so on. As ultraviolet light is a kind of electromagnetic wave, containing high energy, ultraviolet light in the irradiation of air, the air will completely kill pathogenic microorganisms at the same time, will also be the decomposition of oxygen in the air to produce ozone, ozone may cause adverse effects on the human body, so it is recommended that UV disinfection lamps used half an hour before entering the room. Enter the room first open the door, open the window to ventilate, in order to avoid ultraviolet radiation on human skin and eyes, so the ultraviolet disinfection lamp is turned on, it is necessary to do a good job of protection, avoid looking directly at the light.