What were the criteria for distributing the led bulbs? Why did ERA concentrate in the central region alone? Why not in the north or East or any other part of the country?

The led bulbs were given out as a Demand Side Management measure to reduce on the consumption at night on the high consuming feeders.

The 100 watts bulb (ordinary bulb) consumes one kilowatt of electricity if used for 10 hours as compared to a 8 watts led bulb which consumes the same amount in 30 hours with a brighter light emission.