The good thing about far uvc is it isn't penetrating. It doesn't it make it through your your outermost cornea or epidermis layers. Scatter is also negligible

The good thing about far uvc is it isn't penetrating. It doesn't it make it through your your outermost cornea or epidermis layers. Scatter is also negligible as long as its set up competently: reflectivity is very different for UV and visible light. Ozone production certainly limits the maximum power that can be used, but as I understand it you don't need to crank anything close to max power to attenuate the airborne viral load.