I dont like to talk about zero energy projects that defy physics but i dont mind talking about low finite energy projects. There is even work being done to convert the heat from an LED into electrical energy so it can be 'recycled' back to the power system or maybe the LED itself. It does not make the LED 100 percent efficient, but it does raise the efficiency.Which is why I've been saying this "beam" idea while interesting is never going to be anything more than that - interesting, no mechanical advantage at all.