Comment Re:Cool (Score 1) 222
Then this ain't necessarily the best solution for big cities.
Big cities usually have at least the beginnings of electrical distribution infrastructure; the solution in a big city is to improve the transmission infrastructure, and the generation infrastructure. An investment in these two things will give benefit to a relatively high number of people for each (say) coal fired plant you turn into a reliable generating station, or whatever your source of power is. The centralisation that defines the big city helps here.
But where there aren't any wires around for miles, then this is a low-cost way of starting to get around the problems of lack of lighting after dark.