Most have probably seen it already. Just found this interesting, so I wanted to share
I always felt there was a problem with the solar origin of his powers. It seems to me that Superman gains his powers from merely being exposed to solar radiation without any relationship between the amount of radiation he gets and the amount of energy he expends when using his powers. This energy must come from somewhere. There is only so much energy Superman could possibly accumulate to fuel his powers, the direct sunlight energy he absorbs would not be very high. Even if he was highly efficient at capturing solar radiation and store it without any loss, he'd probably use up decades of accumulated solar energy using even a fraction of his full powers. To keep his powers really tipped up he'd have to be almost permanently sun dipping and absorbing as much radiation as possible, probably moving to the other side of the world at night to squeeze every last joule out of the solar radiation.