UVC Testing, Lab Results & Notes
GE Current, a Daintree company, has completed room-scale tests of its 365DisInFx® UVC disinfection technology LPU series devices that show reduction of the aerosolized viruses SARS-CoV-21 (the virus that causes COVID-19), and bacteriophage MS22.
Applying photobiological science and mathematical modeling to the results of device testing and published literature, continuous operation of a properly installed array of 365DisInFx® LPU Gen 2 devices is predicted to provide 90% (1-log10) inactivation of aerosolized SARS-CoV-2 in the first hour1 or less of exposure and 99% inactivation (2-log10) in 2 hours or less of exposure in most spaces when configured for an 8-hour or greater Permissible Exposure Time (PET) as defined in IEC 62471 – Photobiological Safety of Lamps and Lamp Systems standards. Current continues to conduct additional supporting experiments.
1Testing with the SARS-CoV-2 using LPU devices with prototype refractive optics resulted in 90% inactivation of the aerosolized virus within 2 hours. This testing was then used as the basis for photobiological science and mathematical modeling. The test was conducted in an 8-by-20-by-8-foot room equipped with twelve LPU devices using prototype refractive optics, configured for 8-hour Permissible Exposure Time (PET) at head height (7 feet). SARS-CoV-2 Isolate USA-CA1/2020 was used in this testing, and results are expected to be applicable to other SARS-CoV-2 isolates or strains, including B.1.617.2 (Delta) or other Variants of Concern or Interest, as well as to seasonal human coronaviruses.
2Testing with the bacteriophage MS2 resulted in 88% inactivation of the aerosolized virus within 4 hours. The test was conducted in a 10-by-10-by-8-foot room equipped with seven LPU prototype devices, configured for a 4-hour Permissible Exposure Time (PET) at head height. Bacteriophage MS2 is a nonenveloped virus that is commonly used as a surrogate in testing for viruses that are pathogenic to humans. It is particularly useful as a surrogate whereas published scientific testing and literature supports that bacteriophage MS2 is more resistant to UVC than certain enveloped viruses such as coronaviruses and influenza.