UV Disinfection Technology

Ultraviolet (UV) light is a term which is normally associated with the UV radiation that we receive from the sun. It is a spectrum of light, or electromagnetic radiation, that ranges from 10 – 400 nanometers (nm), and since the limit of human vision is approximately 400 nm, the ultraviolet light is not visible to the human eye.

Within the ultraviolet spectrum, the light is specified in the following categories:


At UVCbyEFSEN we use the UVC spectrum for our disinfection technology.

UVC can also be described as ‘germicidal radiation’, as it has long been recognized as having the ability to efficiently inactivate single-celled microbes such as viruses and bacteria.

UVC irradiation

UVC irradiation for disinfection purposes

At specific wavelengths within the UVC spectrum, the UV light is particularly effective at disinfecting all types of objects that is exposed to the light. Throughout the last century, research and applications of UV disinfection has been established, with the knowledge that the wavelength 253.7 is the most efficient for disinfection.  

UVC lamps have been used for disinfection for decades. When a virus infects a host, it uses RNA or DNA to replicate, this is how it grows in number, trying to overwhelm our immune system and later spread to a new host. The energy of UVC light interacts with DNA and RNA, altering its structure so that it does not function.

Advantages of UVC disinfection technolgy

The UVC light bulbs used in our products have been verified to neutralize bacteria and viruses, when used according to our operations instructions. Please see our knowledge articles below for more information on UV disinfection technology, and our products’ ability to inactivate bacteria and viruses.


UVC for disinfection of surface

An overview of the advantages of using UVC light for disinfection during the Covid-19 pandemic, and the doses required for inactivating well-known bacteria and viruses.

”It seems that Covid-19 stays up to 28 days on a surface – UV can prevent that!”

An article by Virology Journal states that a new study reports a high surface stability of SARS CoV-2 at room temperature, up to 28 days, for surfaces with high viral concentrations (corresponding to the concentration in saliva from infected patients).

Covid-19 response
IUVA_International Ultraviolet Association_EFSEN UV & EB TECHNOLOGY

IUVA Fact Sheet on UV Disinfection for COVID-19

The International Ultraviolet Association (IUVA) believes that UV disinfection technologies can play a role in a multiple barrier approach to reducing the transmission of the virus causing COVID-19, SARS-CoV-2, based on current disinfection data and empirical evidence. 

The effect of EFSENs UV BAR proven by new research establishing the UVC dose required for disinfection of SARS CoV-2 (the Covid-19 virus)

New research from two independent studies provides data for inactivation of SARS CoV-2 (the Covid-19 virus) with UVC light at 254 nm. Following the latest scientific advances, EFSEN updates the recommendations for use of UV BARx1 and UV BARx1 PRO, with new, more beneficial values replacing the previous estimated averages based on old studies. 

New research establishes dose for disinfection of sars-cov-2 - Covid-19_EFSEN UV & EB TECHNOLOGY


UV light from a UV lamp and specially UVC light is very harmful to eyes and skin. Proper shielding of persons and living organisms in the surroundings within 10 m of the UVC source must be established. To secure against reflected radiation from the UVC source, personal working close to the system must wear UV-resistant face shields (clear or colored polycarbonate full face shield covering must be worn), full coverage of work clothes and gloves so that no skin and eyes are exposed to UV. UVC light should under no circumstances be used to clean living organisms.

Please do not hesitate to contact us with your challenges regarding Covid-19, and we will help you find the best solutions to solve your needs.