Signs like this could be found in the late 1800s/early 1900s, explaining this strange new technology.
(media.piefed.world)
If you turn the lights off, no current flows so there's not even any slight EM radiation to worry about. It's just inert materials at that point, isn't it?
Now that you brought up EM radiation, let me tell you what has been hidden from you:
Detailed discourse on the hazards of EMF, and a chance to buy my unique solution.
Nah. I'm just fucking with you. Not everyone on the Internet is nuts - only most of us.