Something still ain't right about that first photo, IMHO.
Why is the lighting also missing from Dadong, Shenyang and Dalian in China north of DPRK, which themselves are no shabby villages but rather streaming w/ light at night?
IOW, at 8:59 PM, there is light. Then at the sroke of nine PM, at 20 power stations, 20 master switches are thrown (who will argue with an order in NK?) and the country goes dark virtually all at once (except for Dear Leader's palaces etc with their own generators and fuel supplies).
This would be very cool to watch on streaming satellite video, if there is such a thing.