Night Light of Yichang (Hubei) from space (China) Src. Average luminocity for 10x10km area is 66.4178% and for 50x50km: 9.0059%.
Square area 10x10 km:
 14.69%
 19.41%
 9.97%
 5.07%
 6.64%
 10.14%
 15.38%
 3.5%
 5.42%
 9.62%
 0.17%Square area 50x50 km:
 1.12%
 1.69%
 1.1%
 0.84%
 0.95%
 1.29%
 2%
 1.29%
 2.39%
 6.54%
 80.8%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
31° 19' 1.3" North, 110° 34' 53.8" East
30° 42' 52" North, 111° 17' 5" East
30° 6' 29" North, 111° 59' 16.3" East
Some cities around Yichang sort by population:
• Shashi
		102.5 km =63.7 mi, 
116°
• Jingzhou
		95.7 km =59.5 mi, 
115°
• Jingmen
		94.7 km =58.8 mi, 
67°
• Zhicheng
		51.1 km =31.8 mi, 
155°
• Zhongxiang
		133.6 km =83 mi, 
67°
• Buhe
		102.2 km =63.5 mi, 
117°
• Nanzhang Chengguanzhen
		129.6 km =80.5 mi, 
23°
• Zhijiang
		55.4 km =34.4 mi, 
125°
Sources (retrieved 2019-11-25):
» NASA, Earths city lights 1995
» NASA city lights 2003
» Earth at Night: Flat Maps 2012, 2016