If that box is attached beneath a bridge, has flashing lights and looks "home made" I hope you have the sense not to point at it and giggle and blow it off as a prank.
Its not even a prank, its called a Lite-Brite. Pre-schoolers often play with a very similar device. I hope if you see some lightbulbs attached to a plastic sheet that you have the common sense to remain calm and not shut down half a city.
"Lights and wires" describes almost everything in the modern world. Sorry. We can't shut down and have panic attack every time an electrical device is discovered, unmanned. The absurdity of standardizing/justifying this reaction is beyond comprehension, but I doubt you thought of that.