How does UV light produce ozone?
Theoretically, ultraviolet light with wavelengths shorter than 243 nm can excite oxygen in air or water to produce ozone. UVC-LEDs with wavelengths higher than 243 nm do not produce ozone.
Does UVC deep ultraviolet rays harm the human body and how to protect them?
This is a relatively classic problem. UVC deep ultraviolet is not harmful to human skin, but it is more harmful to human eyes. The typical UVC-LED wavelength of 275 nm ultraviolet light is almost 97% absorbed by the stratum corneum of human skin, more than 99.9% absorbed by the stratum corneum and epidermis, and a very small part of the light will hit the dermis. Ultraviolet rays only act on the dermis layer to cause skin cells to become cancerous. Therefore, it is generally believed that UVC ultraviolet rays have little effect on human skin. Of course, baby skin, including some human skin, is thinner and less resistant to UVC ultraviolet rays. Human eyes are not protected by the stratum corneum. Direct UVC ultraviolet rays will cause lens and corneal lesions. Therefore, it is forbidden to look directly at the lighted UVC-LED lamp beads.