WHAT ARE THE MINIMUM UV-C RAY EXPOSURE TIMES TO ELIMINATE MICROBES?

Each bacterium, virus, yeast, mould or mite requires a different UV-C dose to be deactivated or eliminated.
There are widely recognised documents which report these levels. Light Progress has one of these documents and uses it regularly in designing and implementing its systems. To give an approximate idea regarding the application times of UV-C rays, these can range from fractions of a second to several seconds.

All ultraviolet disinfection products pose a UV radiation hazard. Use only as directed. Protect eyes and skin from exposure to UV light.