Most of the lights are in central Punjab, Islamabad region, and settlements along the Indus river till Karachi. Nearly two third of the country is in minimum light brightness category, showing no significant lights visible from the sky.
Although it might not have taken into account the nighttime electricity supply breaks 'loadshedding' in the country.
A research idea would be to spatially overall it with population, industrial and other demographic data to see which areas are more rich, how many people live there, and what is its relation with economic development of the area. the data is good enough for spatial analysis at tehsil and district levels in the country,
This is taken from World Atlas of Night sky brightness -http://www.lightpollution.it/worldatlas/pages/fig1.htm
Detailed data can be downloaded from the website: