Filmmaker David Parker directed this short video, "Light," to more viscerally express the energy wasted from electric lights unnecessarily left on. I think it's a lovely and haunting piece. From his description:
Bleeding, crying lights were meant to metaphorically parallel the way in which we invisibly squander our natural resources without much thought…
The film was shot over a couple nights in Los Angeles as two friends drove around with a camera exploring the city's architecture and abandoned landscapes.
Sunday / Paper: "Light" (via TreeHugger)