Germicidal Ultraviolet Light

There is a great deal of interest in the use of ultraviolet light to mitigate germs and viruses. The technology of germicidal lighting is referred to as germicidal UV, or GUV. Technically, the GUV spectrum is defined as UV-C. While the UV-C part of the spectrum is an effective killer of COVID-19 and similar viruses, it must be used carefully to be both effective and safe. Information on this site is compiled to help promote the safe and effective use of GUV in residential settings.

May 6, 2020
Can Germicidal Lighting Combat COVID-19?

The use of germicidal lighting as a potential way to combat germs and viruses, including COVID-19, is receiving a lot of interest and publicity lately. Germicidal ultraviolet "light" or GUV refers to the technology of germicidal lighting, which utilizes ultraviolet-emitting sources. While GUV is a technology with great opportunity, it is more complicated than simply turning on a UV light.

April 29, 2020
UV Safety - presented by UL

Safety Considerations for Ultraviolet (UV) Germicidal Devices

Presented by Bahram Barzideh

Primary Desgisnated Engineer Manager for Lighting and for LED Components

April 28, 2020
Video - COVID-19 & Ultraviolet and Visible Light Disinfection

Video discusses UV sterilization.

April 28, 2020
Video - Ultraviolet and Visible Light Disinfection

Topic experts Dr. David Sliney and Richard Vincent will discuss the science, applications, guidelines, potential, and concerns regarding Ultraviolet and Visible Light Disinfection. Many manufacturers are making claims that cannot be substantiated. David and Richard will take you through what we know, what we don’t know and what you should avoid. Specific topics will include upper room germicidal UV application, surface decontamination, and UV tools and guidelines.

April 28, 2020
Germicidal Ultraviolet (GUV) – FAQ - Illuminating Engineering Society

This link provides you with a simplified way to quickly see the FAQs contained in the IES Photobiology Committee’s Committee Report CR-2-20-V1.


Germicidal Ultraviolet Light - Technology Newsletter

April 2020

Wednesday, April 22, 2020/Categories: Technology, Engineering & Technology, Ultraviolet Light & Covid 19

April 22, 2020
As an industry that is being significantly impacted from the ramifications of COVID-19, it is important to gauge the opportunities in front of us and how we can differentiate our businesses moving forward. Our top priority is to do everything we can to help our members and the lighting industry remain healthy, both in body and business.
And, lastly, some cautions:
  • Insist upon and read carefully all GUV product safety and caution notices. If none are provided, ask the manufacturer. If you feel the information provided is incomplete or hard to understand, consider not using the product.
  • Germicidal lighting works only via line-of-sight. Reflected light does not kill germs because most reflecting surfaces in homes absorb the critical UV-C wavelengths.
  • Exposure matters. Exposure = Intensity x Time. Like sunburn, damage to skin and eyes results from being exposed for too long to the light source. GUV exposures, however, are likely to be measured in seconds and minutes, not hours.
GUV is a good way to help control the spread of the COVID-19 virus. Learn the facts to apply it effectively and safely. Be safe and well.
Terry McGowan, FIES, LC
Dir. of Engineering & Technology
American Lighting Association


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