If a place is well lit at night, it probably tells you that there's something brewing there. Artificial lights often equate more houses, more shops and a higher population density. It can tell you about economic progress and a whole host of other things. If you compare two satellite images of india from 20 12 and 20 21, you would see how india is lit up differently now, as opposed to 20 12. This tells us something,. according to the economic survey, provides an interesting representation of the expansion of electricity supply...and growth of ribbon developments between urban hubs.