The UV-C light based disinfection devices should be tested and certified as they are meant for use at homes or commercial spaces like hospitals, shops, hotels, etc.
Products that use the UV-C light technology require rigorous testing to ensure items placed in it receive the prescribed dosage and the correct amount of exposure to the UV light.
Certification laboratories not only ensure the dosage and exposure required to kill bacteria and viruses but also check for leakage of UV-C light. The UV-C light, if leaked, can be hazardous to one's health.
While non-certified systems may come at a lower price, the risk of inadequate dosage or leakage of light is higher. Therefore, for safety and reliability, one must consider products that are tested by reputed laboratories to understand and make an informed purchase to safeguard themselves against serious health hazards posed by such products.