Voltage, A, and Watts dangerous for humans, also UV-C

Johan_Ha:
No. The other way around. I have solar panels on my roof. The voltage is 500 V DC. The guys who installed them said that they have a few times had a 500 V shock. It feels very nasty but is not particularly dangerous. A 240 V AC shock on the other hand kills you.

AC messes with your heart and stops it. It also paralyses your brain and muscles and prevent you from resqueing yourself.

tell that to the guy in the electric chair. After zapping him several times, with AC high-voltage/current, he was still alive. The AC current/voltage made his heart pump very very fast, keeping him alive. However DC current makes the heart contract, and holds it. The end results of the first execution by AC current was torture to the individual. actually setting him on fire, before he died.

The key is, the current has to go across your heart. That is why when working on high-voltage equipment, technicians are taught to reach in with only one hand, not both. That way if they get a shock, there is less chance of it going across the heart. Tessler knew this, and put on shows showing how safe AC current is.

About the UV-C light I want to use it for an antibacterial effect in a room approximately 55/60 cubic meters volume, but I don't know how much Watts must be in order to have the desirable effect and it won't be used when there is someone in the room