[jnhnum1]

Energy is certainly not being generated. The energy of the light output will be equal to the heat absorbed plus the electric energy input.

If you want to think of it in terms of temperatures, I'm a little fuzzy on the details, but I think in a sense empty space has a temperature associated with it based on the radiation that is present (similarly to how black body radiation is a function of temperature).

[ars]

I guess if the LED was heated more than the room where you receive the light it would work.

So you have to put this into an oven for it to work - if you just left it in a room, and expect it to also put light into that room (i.e. the device and the room are the same temperature) it would not work.

[justncase80]

So can we solve global warming by creating a bunch of gigantic LED billboards?