just have read an article on Greenhouses of Cayambe Valley by NASA-EO -which would worth an own thread itself-, when caught sight of an urban area shining so bright, at first glance I thought it is some just-before-night aerial view, but it is not...
aerial imagery was taken after severe rains and all surfaces where water could stand (with other shiny surfaces) are reflecting sunlight. (proof: same effect on water table of the lake to the right)
one thing was needed, that sunlight beam- and camera angle had to fit so nicely.
an other explanation would be some local tradition, when people switch their high-performance torches and point to the sky at the same time. (: