Yea that is crazy my father in law and brother in law ate one of the ghost chip challenge thing. It was funny they tried to act tough but it burnt there a$s up
How much light are you giving them? All leaves that have direct light looks burnt but undergrowth looks green. Also leaves are curling up it seams I read somewhere it could be a sign of to much light.
I have seen 220v on temp power on a job site and my side grinder sounded like it was going to take flight. I can see how that could blow something but I would think it would happen when you plugged it in. Could it be a connection inside the sign?
About an hour from my house in Florida. We was up high enough that I could see the ocean and it is at least 45 minute drive from the jump site. Now time to go home and smoke a hooter.