Night Light of Hangu (Tianjin) from space (China) Src. Average luminocity for 10x10km area is 64.4133% and for 50x50km: 23.8275%.
Square area 10x10 km:
 14.12%
 14.12% 12.41%
 12.41% 6.97%
 6.97% 7.14%
 7.14% 11.73%
 11.73% 13.95%
 13.95% 12.93%
 12.93% 10.2%
 10.2% 10.54%
 10.54% 0%
 0% 0%
 0%Square area 50x50 km:
 5.55%
 5.55% 3.72%
 3.72% 2.51%
 2.51% 2.82%
 2.82% 3.76%
 3.76% 3.88%
 3.88% 3.4%
 3.4% 3.62%
 3.62% 4.41%
 4.41% 8.17%
 8.17% 58.17%
 58.17%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
39° 47' 28.6" North, 117° 5' 9.8" East
39° 14' 56" North, 117° 47' 21" East
38° 42' 8.2" North, 118° 29' 32.3" East
Some cities around Hangu sort by population:
• Tanggu
		28.1 km =17.5 mi,  205°
205°
• Chitu
		33.7 km =20.9 mi,  261°
261°
• Beihuaidian
		19.4 km =12.1 mi,  273°
273°
• Biaokou
		22 km =13.7 mi,  292°
292°
• Zaojiacheng
		30.6 km =19 mi,  275°
275°
• Ningchegu
		14.8 km =9.2 mi,  227°
227°
• Xitangtuo
		27.2 km =16.9 mi,  287°
287°
• Dawangtai
		26.3 km =16.3 mi,  276°
276°
Sources (retrieved 2019-11-25):
» NASA, Earths city lights 1995
» NASA city lights 2003
» Earth at Night: Flat Maps 2012, 2016