This kind of comment gets posted on everything from low tech magazine. I think the authors intention is not to give practical ideas that could be widely deploy

This kind of comment gets posted on everything from low tech magazine. I think the authors intention is not to give practical ideas that could be widely deployed to the world but instead to give ideas to people who find enjoyment out of maximising efficiency as a hobby. The author is a person who turns most of the lights off so they can run their office on a solar panel hanging out their apartment window.