UV sterilizing lamps may produce ozone when operating, especially if they use ultraviolet light in the so-called UV-C band.

This type of UV light is effective in destroying the DNA of microorganisms, which results in sterilization. 

However, in some cases, these lamps may produce ozone (O₃), a gas with strong oxidizing properties. Ozone blocks harmful UV rays in the atmosphere, but at ground level, high concentrations of ozone can be harmful to health.

Inhalation of ozone can cause a range of health problems, including lung irritation, difficulty breathing, sore throat, coughing, and aggravation of respiratory conditions such as asthma. Prolonged or high dose exposure to ozone may also lead to lung tissue damage and other serious health problems. Therefore, safety should be observed when using UV sterilizing lamps. 

If the instruction manual of the equipment mentions that ozone is produced, then it should be ensured that it is used in an unoccupied environment and that it is adequately ventilated after use to avoid direct human contact. For UV sterilizing lamps for home or office use, it is recommended to choose a product that does not produce ozone. Also, the safety information on the product should be consulted before purchase and use.