Shouldnt, I was hoping for a better source then a chabad article (hint hint – the Chazon Ish.) 🙂
The ChazOn Ish says that completing a circuit is binyan. A single, unified device.
However, many poskim do not rule like the Chazon Ish; hence permitting usage of LED lights and the like, and electricity which does not involve sparks ( most do). But electricty unto itself, save for the Chazon Ish of Binyan which most poskim disagree with (R’ Moshe, R’ Shlomo Zalman ).
I recently spoke to a renowned Posek about opening a freezer (not dealing with the motor issue) and causing the LED lights to go on; he too permitted it.
Fluorescent lights, as well, would be permitted – but they have a sparker, hence certainly making them Aish. But the lights themselves would seem to be permitted (save for the Chazon Ish).
Practically, this has little application, as most electrical & motor appliances involve sparks at some point, and certainly in a D’Orayasah one would be wary of the words of the Chazon Ish, but I wanted to play Devil’s Advocate.