It is important to state how the correct wavelengths for a synergistic effect are chosen for germicidal communications.

A crucial property of human safe Far-UVC-mediated germicidal effects is that it is essentially independent of acquired drug resistance, still, Far-UVC light effects are bound to the laws of physics.

The invention involves the use of semiconductors to emit digital signals over light wavelengths in a specific far-UVC range.

Studies have established a human safe wavelength window exists in the far-UVC region (between 207–230 nm) that inactivates viruses and bacteria efficiently but is not cytotoxic or mutagenic to mammalian cells. This invention claims to use the wavelengths within this window for data transmission in occupied spaces with human-safe germicidal wavelengths established in this far-UVC range.

Specifically, the communications wavelengths chosen to be used in the far-UVC light spectrum must have enough range to provide a germicidal effect by traversing microbes that are much smaller in size than human cells [less than 1 μm in diameter, compared to the diameter of typical human cells ranging from about 10–25 μm], where the far-UV wavelength is strongly absorbed by the proteins in the cytoplasm of human cells and is drastically attenuated or entirely absorbed before reaching the human cell nucleus. Therefore, it follows that the far-UVC light wavelength cannot penetrate the stratum corneum of the skin or reach the underlying critical basal cells or melanocytes.

Also critical in choosing the optimal far-UVC wavelength for germicidal communications, the human eye lens is positioned distal to the cornea that is sufficiently thick [~500 μm]. As a result, penetration of the proposed far-UVC light wavelengths through the cornea to the lens must be predicted to be near zero under optimal communication frequencies between the wavelengths of 207nm to 230nm.

Because Far-UV has proven to be safe to eyes and skin, continuous operation of far-UVC light communication would not require the use of cumbersome protective clothing, hoods, and eye shields for those occupying an active disinfection zone, making it a suitable replacement for RF communications while deploying pandemic countermeasures.