NOT UV light at all
@Tinman57
The black light you are thinking about use UV-C and some UV-B. It can cause sunburns and eye problems.
All UV are invisible.
This technology use VISIBLE light specificaly tuned to affect some specific molecules inside the bacterias and turn those molecules into poison that kills the bacterias. The amount of poison produced is infinitesimal, way under the detection thressold, and won't persist long once the bacteria is dead. That light is harmless for us, even if it may be somewhat stressful to the eyes.
@GuntherGump
As you can recompose a white illumination, you can have that light continously on in most areas, including hallways, rooms and waiting rooms.
It can be treated as an area and surfaces treatment. For peoples, it's even less intrusive than washing your hands. It can be looked upon the same way as the addition of tiny amounts of iodine in table salt to prevent some disorders.
As that light don't affect humans, and any mamals, birds and reptiles, you don't have any problem from using it. It also probably don't affect most insects as ther DNA is protected under a chitinous exoskeleton. It could affect only the tinyest, colourless, insects whose chitin is so thin as to be effectively transparent.
@darkstate
Ozone is indeed great at desinfecting, but it does have some serious drawbacks. First and foremost, it's very iritating. You just can't use it where you have peoples who may have respiratory problems, or eye problem/infections.
Then, it must be produced as it is used, and that production use a large amount of electricity and generate quite some heat.
Great for treating places where there is nobody, or at water treatment plans where it does a Greatly beter job than chlorine.
