Sparks from "Overloading lighting circuits" only work once.

[parf]

i'm not sure if this is intentional or not, but, as the AI, this kind of sucks since you can't really start plasma fires or blow up welding fuel tanks with this method anymore.
You were able to get sparks flying out of the light fixtures as much as you'd want by just clicking "Overload lighting circuits", but now the sparks come out once when the lights blow up and that's it!