I went to a medical equipment outlet and bought a violet light for home disinfection, but there is always a strange smell in the room after use, kind of like ozone but not sure. Please ask this

Ultraviolet lamps can be used when the windows and doors are closed tightly, people are not allowed in the room. Turn it on for half an hour and then turn it off, and then wait another 1-2 hours and then enter the room will not feel the odor. Low concentration ozone is grassy odor. Because the human sense of ozone is very strong, 0.01PPM normal people will smell. Ultraviolet lamps have lamp material irradiation air is ozone. Food processing plants have UV lamps to generate ozone for air disinfection and equipment disinfection.