Night Light of Yigou (Henan) from space (China) Src. Average luminocity for 10x10km area is 17.6993% and for 50x50km: 12.4088%.
Square area 10x10 km:
 1.4%
 2.97%
 0.7%
 1.92%
 2.1%
 0%
 3.5%
 6.47%
 6.12%
 20.1%
 54.72%Square area 50x50 km:
 0.82%
 1.91%
 1.27%
 1.19%
 1.74%
 1.98%
 2.02%
 3.36%
 3.53%
 11.4%
 70.78%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
36° 22' 46.3" North, 113° 36' 48.8" East
35° 48' 41" North, 114° 19' 0" East
35° 14' 20.9" North, 115° 1' 11.3" East
Some cities around Yigou sort by population:
• Anyang
		32.2 km =20 mi, 
10°
• Xinxiang
		83.3 km =51.8 mi, 
214°
• Puyang Chengguanzhen
		64 km =39.8 mi, 
100°
• Hebi
		14.8 km =9.2 mi, 
311°
• Linshui
		68.9 km =42.8 mi, 
351°
• Hecun
		82.4 km =51.2 mi, 
347°
• Pengcheng
		70.2 km =43.6 mi, 
349°
• Daokou
		32.4 km =20.1 mi, 
148°
Sources (retrieved 2019-11-25):
» NASA, Earths city lights 1995
» NASA city lights 2003
» Earth at Night: Flat Maps 2012, 2016