People should just use solar cells for there lights, because I have seen that a lot of country there is no snow in the winter.
So that is not a good sign also for bitcoin is good power to have if you are a miner.
Looks good in theory, but very difficult to implement this in practical life. First of all, the solar panels are very expensive and solar energy costs as much as 5 times that of wind energy or hydro-power energy. Also, many of the developing nations are not technologically advanced to manufacture these panels on their own, which will force them to import the same from China or Malaysia, further increasing the costs.