Author: Amaris Luo Email: [email protected] Whatsapp: +86 13667831599
It is no secret that certain wavelengths of light can kill microbes, like these being used in some public bathrooms and tests on airplanes for quick surface "cleaning." However, light sterilization typically uses light at a wavelength of 254nm, while useful for inactivating certain viruses, is dangerous to human eyes and skin.
In 2020, researchers at Hiroshima University in Japan have demonstrated that ultraviolet wavelengths that are safe to use around humans can also kill the virus that causes the new corona-virus. The newly published study is the first to show that far-ultraviolet light (Far-UVC) with a wavelength of 222nm is particularly effective against SARS-CoV-2, not just structurally similar corona-viruses.
The risk to humans posed by this light limits its use in public spaces during working hours. However, there is growing evidence that the safer 222nm wavelength is also effective against many pathogens, and this light does not pose a threat to human vision and skin.
Since this wavelength of light does not penetrate the protective layers of human tissue, it does not cause harm to human vision or skin, making it more attractive and safer than the commonly used 254nm germicidal UV light.