Night Light of Zhaogezhuang (Hebei) from space (China) Src. Average luminocity for 10x10km area is 40.0408% and for 50x50km: 25.1575%.
Square area 10x10 km:
 5.61%
 5.61% 4.93%
 4.93% 6.63%
 6.63% 4.42%
 4.42% 5.95%
 5.95% 8.84%
 8.84% 4.93%
 4.93% 5.61%
 5.61% 14.63%
 14.63% 27.21%
 27.21% 11.22%
 11.22%Square area 50x50 km:
 4.85%
 4.85% 3.16%
 3.16% 2.64%
 2.64% 2.58%
 2.58% 3.62%
 3.62% 4.87%
 4.87% 3.48%
 3.48% 5.63%
 5.63% 7.14%
 7.14% 13.48%
 13.48% 48.55%
 48.55%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
40° 18' 13.4" North, 117° 42' 31.6" East
39° 45' 55.4" North, 118° 24' 42.9" East
39° 13' 22" North, 119° 6' 54.1" East
Some cities around Zhaogezhuang sort by population:
• Tangshan
		24.5 km =15.2 mi,  233°
233°
• Linxi
		6.8 km =4.2 mi,  151°
151°
• Tangjiazhuang
		4.1 km =2.5 mi,  126°
126°
• Fengrun
		26.3 km =16.3 mi,  286°
286°
• Changli
		63.5 km =39.5 mi,  96°
96°
• Songling
		59.9 km =37.2 mi,  348°
348°
• Guye
		4.6 km =2.9 mi,  147°
147°
• Fengtai
		61.2 km =38 mi,  247°
247°
Sources (retrieved 2019-11-25):
» NASA, Earths city lights 1995
» NASA city lights 2003
» Earth at Night: Flat Maps 2012, 2016