According to this research paper...the light technology has been known since 1930.
https://www.ncbi.nlm.nih.g...

Since the 1970s combinations of various spectra of light and photosensitizers have been used to inactivate a multitude of pathogens, including viruses that cause HIV-AIDS, Ebola, MERS-CoV, [3], hepatitis [[4], [5], [6]], Crimean-Congo hemorrhagic fever, and SARS. Other viruses susceptible to PDI include, Nipah virus [7], Zika virus [8], cytomegalovirus, human parvovirus B19, and human T-cell lymphotropic virus Types I and II [[9], [10], [11], [12], [13], [14], [15], [16], [17]]