What is ultraviolet (UV) light?
Ultraviolet light is a type of electromagnetic radiation that can be transmitted in waves or particles at different wavelengths and frequencies.
What is germicidal UV light?
Germicidal ultraviolet light is UV light that inactivates microorganisms by disrupting their DNA. The degree of disinfection is related to the spectrum of UV, the intensity, and the duration.
What are the different types of UV light?
The types of UV light include â€¢ UVA: UVA accounts for approximately 95 percent of the UV radiation reaching the Earthâ€™s surface. It is responsible for tanning, skin aging, and wrinkling, and is an effective disinfectant for many common bacteria.
UVB: Most solar UVB is filtered by the atmosphere and is responsible for delayed skin burn and skin aging. It significantly promotes the development of skin cancer and is a highly effective disinfectant for many common bacteria.
UVC: This is the most biologically damaging type of UV radiation and is completely filtered by the atmosphere. It does not reach the Earthâ€™s surface. It is extremely effective for both bacteria and viruses. GERMICIDAL UV LIGHTING
Can germicidal UV light kill both bacteria and viruses including the coronavirus?
All types of UV light can inactivate bacteria with the correct direct exposure time and intensity. The UV- C spectrum is the only UV light proven to inactivate viruses and is believed to inactivate coronavirus, but can be dangerous to humans when directly exposed.
Is there clinical data showing the effectiveness of UV-C light in deactivating Coronavirus?
There are a number of studies, one of the key studies is from Columbia University proving that Far-UVC light (222 nm) efficiently and safely inactivates airborne human coronaviruses, the study is presented by Manuela Buonanno, David Welch, Igor Shuryak & David J. Brenner, this was done with 222nm, which is weaker than most UV-C lamps used at ceiling height which is 254nm, which is more effective.
Are there safety concerns with germicidal UV-C light?
There are very serious health conditions that can develop due to exposure to germicidal ultraviolet light if not properly designed, installed, and maintained. Over exposure to Skin of germicidal wavelengths can produce skin reddening and skin cancer and direct exposure of the eye to germicidal wavelengths can produce serious vision problems.
What are the safety guidelines associated with germicidal UV light?
Safety guidelines can be found from the following sources: â€¢ National Institute for Occupational Safety and Health â€¢ World Health Organization â€¢ The International Commission on Non-Ionizing Radiation Protection â€¢ The Center for Disease Control
Where is germicidal ultraviolet light being safely installed?
In hospitals and healthcare systems that are highly concerned with infections, particularly bacterial and viral infections.