Night Light of Luancheng (Hebei) from space (China) Src. Average luminocity for 10x10km area is 28.1445% and for 50x50km: 25.8501%.
Square area 10x10 km:
 1.62%
 3.57%
 5.03%
 3.73%
 2.92%
 5.03%
 3.73%
 7.31%
 8.12%
 26.46%
 32.47%Square area 50x50 km:
 5.87%
 5.5%
 3.76%
 3.02%
 3.47%
 3.06%
 3.02%
 3.26%
 3.32%
 7.67%
 58.04%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
38° 25' 55.4" North, 113° 56' 54.8" East
37° 52' 45" North, 114° 39' 6" East
37° 19' 19.6" North, 115° 21' 17.3" East
Some cities around Luancheng sort by population:
• Shijiazhuang
		23.6 km =14.7 mi, 
319°
• Xingtai
		91.8 km =57 mi, 
188°
• Hengshui
		93.6 km =58.2 mi, 
100°
• Yangquan
		95.6 km =59.4 mi, 
268°
• Dingzhou
		76.6 km =47.6 mi, 
23°
• Xinji
		48.5 km =30.1 mi, 
86°
• Nangong
		86.1 km =53.5 mi, 
132°
• Tianchang
		57.3 km =35.6 mi, 
283°
Sources (retrieved 2019-11-25):
» NASA, Earths city lights 1995
» NASA city lights 2003
» Earth at Night: Flat Maps 2012, 2016