UV-A and Disinfection

Goals

To provide several articles that discuss UV-A's effectiveness in disinfection of the human body.

Early Findings

While there are articles that discuss UV light's effectiveness in disinfecting surfaces, there was not much information on its effectiveness for the human body.
  • According to the Illuminating Engineering Society (IES), UV-C is the most effective at killing bacteria and viruses. However, it is also harmful to the human skin.
  • There have been studies that show that 222nm UVC lamps are extremely effective at killing pathogens yet it does not affect our skin.
  • Far-UVC light of 185nm has also been proven to kill germs.
  • UV-A is not as effective as UV-C or UV-B due to the lack of degrading properties. In fact, it is 1,000 times less effective at killing bacteria and other microorganisms than UV-C and UV-B.
  • There are, however, products that use a broad UV spectrum to kill germs, with wavelengths going from 200nm to 400nm.
  • Some of those products include pulsating xenon lamps, with manufacturers such as Healthé Cleanse and PURO Lighting being one of the more popular examples of companies offering broad UV light products for disinfection.
  • UV-A lights are usually used in hospitals and age care facilities to reduce the rate of bacterial infection. An example of a company that produces UV-A products is Stanley.

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