Night Light of Fengrun (Hebei) from space (China) Src. Average luminocity for 10x10km area is 57.068% and for 50x50km: 17.9487%.
Square area 10x10 km:
 10.03%
 10.03% 11.05%
 11.05% 6.97%
 6.97% 6.97%
 6.97% 10.2%
 10.2% 11.56%
 11.56% 9.52%
 9.52% 8.84%
 8.84% 14.12%
 14.12% 10.71%
 10.71% 0%
 0%Square area 50x50 km:
 3.7%
 3.7% 2.18%
 2.18% 1.35%
 1.35% 1.86%
 1.86% 2.76%
 2.76% 3.5%
 3.5% 2.93%
 2.93% 4.37%
 4.37% 5%
 5% 8.08%
 8.08% 64.28%
 64.28%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
40° 22' 16.1" North, 117° 24' 48.8" East
39° 49' 60" North, 118° 7' 0" East
39° 17' 28.6" North, 118° 49' 11.3" East
Some cities around Fengrun sort by population:
• Tangshan
		23 km =14.3 mi,  165°
165°
• Hangu
		70.8 km =44 mi,  203°
203°
• Linxi
		31.5 km =19.6 mi,  115°
115°
• Zhaogezhuang
		26.3 km =16.3 mi,  106°
106°
• Tangjiazhuang
		30.3 km =18.8 mi,  109°
109°
• Songling
		52.7 km =32.7 mi,  14°
14°
• Guye
		30 km =18.6 mi,  112°
112°
• Fengtai
		43.9 km =27.3 mi,  225°
225°
Sources (retrieved 2019-11-25):
» NASA, Earths city lights 1995
» NASA city lights 2003
» Earth at Night: Flat Maps 2012, 2016