LED household germicidal light manufacturers tell you that there are generally two types of ultraviolet lamps used for sterilization and disinfection, one is ozone (185nm), and the other is ozone-free (253.7nm).

LED household germicidal light manufacturers tell you that the ozone-free 253.7nm germicidal lamp emits ultraviolet rays by itself, which can efficiently kill microorganisms including bacteria, viruses, and fungi within 1-2s, and the sterilization rate can reach 99.99%.
LED household germicidal light manufacturers tell you that the 185nm germicidal lamp with ozone, in addition to sterilizing by emitting ultraviolet rays by itself, can also convert oxygen into ozone, thereby destroying the cells of microorganisms through ozone, killing microorganisms, and can also be used to eliminate odors taste.
LED household germicidal light manufacturers tell you that ozone has an odor. Under normal temperature and pressure, it has poor stability and can be decomposed into oxygen by itself.
The above information is the LED household germicidal light manufacturer's introduction and analysis of the classification of the germicidal light, hope it helps you.