Night Light of Leiyang (Hunan) from space (China) Src. Average luminocity for 10x10km area is 30.4337% and for 50x50km: 1.5196%.
Square area 10x10 km:
 6.06%
 5.68%
 3.98%
 1.7%
 3.22%
 2.84%
 7.01%
 4.92%
 4.17%
 23.48%
 36.93%Square area 50x50 km:
 0.25%
 0.23%
 0.16%
 0.07%
 0.13%
 0.12%
 0.35%
 0.24%
 0.23%
 1.49%
 96.74%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
27° 1' 49.6" North, 112° 9' 21.5" East
26° 24' 8.6" North, 112° 51' 32.7" East
25° 46' 15.2" North, 113° 33' 44" East
Some cities around Leiyang sort by population:
• Hengyang
		59.2 km =36.8 mi, 
336°
• Chenzhou
		69.2 km =43 mi, 
165°
• Lecheng
		150 km =93.2 mi, 
160°
• Lengshuitan
		125.8 km =78.2 mi, 
270°
• Yongfeng
		132.3 km =82.2 mi, 
329°
• Wuxi
		101.6 km =63.1 mi, 
281°
• Hongqiao
		85 km =52.8 mi, 
298°
• Bojia
		89 km =55.3 mi, 
274°
Sources (retrieved 2019-11-25):
» NASA, Earths city lights 1995
» NASA city lights 2003
» Earth at Night: Flat Maps 2012, 2016