I like to think of the void, or darkness as you call it, as nothing ! I then bend my mind onto the q of what is nothing ?
If I was to propose that equilibrium of energy gives a state of nothing due to lack of potential difference what would you say ! :detective:
What's this "q" you're talking about?
I would say that a state of equilibrium is different than a state of nothingness.
Equilibrium has two things that are perfectly balanced against each other - nothingness has zero things, period.
"Darkness will act like a vacuum sucking air from the high temperature light areas, so in theory ..yes!"
I think we would technically call that wind energy. Light and the absence of light would be used to create rooms with differing temperatures, and then we would harness the energy of the motion of air caused by the temp. difference. In that scenario we are using light as the main source of energy and then harnessing the wind it creates.
That's not harnessing energy from darkness.