The Ultra Violet light that is used in the Lumin to clean your CPAP equipment will not damage or harm your mask or plastic pieces in any way. This specialized light is designed to be used on medical grade equipment. The UV light is very powerful but is only effective because it damages the outer cells of bacteria, fungi, and viruses which are more fragile than the cells that make up even the softest parts of your CPAP mask. Though prolonged exposure to some lights can damage some materials, you are only placing your equipment into the Lumin’s light chamber for short bursts of time with long periods between exposures. There is no risk to any parts of your equipment or to any other plastic items that you are using your Lumin to sanitize.