I'm afraid I have to say that there's a tiny flaw with the Stefan–Boltzmann formula up there... It assumes that the full spectrum of radiation from the sun hits and is absorbed by heaven.
Well, the verse only mentions light, so one could argue that only the visible part of the EM spectrum exists in heaven and, thus, we would have to cut a good portion of the energy that falls upon that place.
Well, the verse only mentions light, so one could argue that only the visible part of the EM spectrum exists in heaven and, thus, we would have to cut a good portion of the energy that falls upon that place.