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Effectiveness of UV Light Germicidal Sterilization

Nov. 17, 2021

The proven germicidal efficacy of UVC can be traced back to the late 19th century, when Downes & Blunt conducted the first scientific study demonstrating the effectiveness of germicidal UVC in 1877. As detailed in the public health report The History of Germicidal UVC Radiation for Air Disinfection, it took decades for science and medicine to further research and understand the powerful benefits of UVC for disinfection.


Despite these early proven successes of UVC in disinfection, interest in medical use and further research into UVC waned until the 1980s, partly due to the increase in tuberculosis (TB). TB is the leading cause of death in adults from a single infectious agent, with a mortality rate of about 23%. According to the Rensselaer Polytechnic Institute Lighting Research Centre, "Controlling TB transmission with UV irradiation", germicidal UVC lights have been shown to be very effective in eliminating TB when used in wall-mounted, upper-room UVGI air purification systems.


Effectiveness of UV Light Germicidal Sterilization

Ultraviolet radiation delivers maximum germicidal effectiveness to inactivate microorganisms when emitted at the optimal wavelength of 253.7 nanometer (nm), referred to as Ultraviolet germicidal irradiation (UVGI). Germicidal effectiveness decreases when emitted at other than optimal wavelengths. This is why high-quality, UV sterilization lights are so important, to effectively deliver the right amount of UV radiation for the desired application.

UVC Water Purification and Disinfection Machine

UVC Water Purification and Disinfection Machine


Benefits of UV Light for Sterilization

UV light sterilization is an environmentally friendly method of killing bacteria, moulds, fungi and viruses without the use of harmful chemicals and without producing corrosive substances or disinfection by-products (DBPs). In many industries, disinfection of surfaces without the use of chemicals is critical and UVC disinfection can provide a safe and effective solution. UV disinfection and sterilisation systems have been shown to be


Very effective

Cost effective

Low maintenance

Chemical free


UV lamps are used in numerous industries and applications to provide vital solutions to improve the health of people in residential, commercial and industrial environments. For the disinfection of airborne infectious pathogens, fungi, bacteria, viruses, dust mites and spores.

Hand Held UV Lamp

 Hand Held UV Lamp     

UV disinfection can improve health in many industries

Air purification in healthcare - Germicidal UVC technology is particularly important in hospitals and other environments as it is integrated into air conditioning systems to disinfect pathogens that cause disease and contaminants that can aggravate respiratory disease.


Industrial air purification - UVC lamps are used to remove harmful or toxic chemicals produced in many industries and to reduce or eliminate VOCs and industrial exhaust gases containing solvents.

UVC disinfection systems have been proven to improve the health of people in many industries and environments. Germicidal UVC is used to protect people from harmful bacteria, viruses, moulds and other pathogens in a wide range of industries and applications in the following.

Water sterilisation - UVC sterilisation is very effective in eliminating many harmful pathogens from water and killing some bacteria that chlorine cannot kill. UVC water disinfection systems are used to purify drinking water, disinfect water in wastewater treatment plants, swimming pools and spas, life sciences and many other water applications.


Surface disinfection - UV lamps are used in many environments such as restaurants to disinfect kitchen equipment and surfaces, hospitals to disinfect medical equipment, cafeterias and many other surface disinfection environments that can improve public health.

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