The UVB radiation also does DNA damage, causes redness and tans. Exposing a small area to large cumulative radiation doesn't sound like a good idea. I don't kno

The UVB radiation also does DNA damage, causes redness and tans. Exposing a small area to large cumulative radiation doesn't sound like a good idea. I don't know if this would be physiological possible. But you are onto something. Since we spend most of the day inside, maybe installing a DLP projector* with UVB light over the monitor could provide an optimal amount of radiation. The DLP could be used to avoid the eye area. By the way, russia had a full body approach: https://www.nationalgeographic.com/photography/photo-of-the-day/2009/10/ultraviolet-bath-mcnally-pod/ https://www.nationalgeographic.com/photography/photo-of-the-... * I'm not sure if DLP mirrors reflects UVB.