In response to the COVID-19 pandemic, we developed an innovative antimicrobial pulsed blue light technology and demonstrated that it is antiviral against HCoV-OC43 and HCoV-229E—two surrogates of SARS-CoV-2. In further studies, we developed an antiviral light panel with multiple colors—including white— using Pulsed Blue light at 450 nm that could replace commercial light fixtures. We demonstrated a 39.5% decline in viral RNA after 10hr (p <.05). This study indicates that it is possible to develop and deploy a commercial cost-effective light fixture as an environmentally safe decontaminant that can inactivate viruses and other microorganisms.
Recently, we developed an antimicrobial light panel with multiple colors—including white—that could commercially replace light fixtures in farms and other environments that harbor deadly microorganisms. The panel emits blue 450 nm light pulsed at 33 KHz, with 6.85 W average power and 11 mW/cm2 mean irradiance. We demonstrated optimum 100% inactivation of Salmonella enterica serovar Heidelberg following 3hr of illumination with 450 nm wavelength. This finding indicates that it is possible to develop and deploy a safe commercial cost-effective light fixture that can inactivate Salmonella and decontaminate food products.
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