Night Light of Huaihua (Hunan) from space (China) Src. Average luminocity for 10x10km area is 46.4544% and for 50x50km: 3.8327%.
Square area 10x10 km:
 6.55%
 11.9%
 6.75%
 4.37%
 6.94%
 7.54%
 5.56%
 6.35%
 9.33%
 23.02%
 11.71%Square area 50x50 km:
 0.51%
 0.78%
 0.41%
 0.21%
 0.4%
 0.68%
 0.51%
 0.47%
 0.74%
 3.26%
 92.03%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
28° 11' 5.7" North, 109° 18' 3.3" East
27° 33' 48.1" North, 110° 0' 14.5" East
26° 56' 17.8" North, 110° 42' 25.8" East
Some cities around Huaihua sort by population:
• Fenghuang
		57.4 km =35.7 mi, 
316°
• Qianzhou
		88.1 km =54.7 mi, 
342°
• Tongren
		82.4 km =51.2 mi, 
281°
• Hongjiang
		50.4 km =31.3 mi, 
180°
• Anjiang
		28.8 km =17.9 mi, 
160°
• Qiancheng
		48.2 km =30 mi, 
209°
• Liuduzhai
		94.4 km =58.7 mi, 
103°
• Simenqian
		87.4 km =54.3 mi, 
95°
Sources (retrieved 2019-11-25):
» NASA, Earths city lights 1995
» NASA city lights 2003
» Earth at Night: Flat Maps 2012, 2016