Night Light of Honggang (Heilongjiang) from space (China) Src. Average luminocity for 10x10km area is 30.4122% and for 50x50km: 17.4664%.
Square area 10x10 km:
 0.74%
 7.74%
 3.42%
 1.64%
 2.08%
 5.95%
 3.87%
 8.18%
 10.71%
 39.88%
 15.77%Square area 50x50 km:
 2.86%
 4.18%
 1.72%
 2.06%
 2.66%
 3.18%
 2.06%
 2.4%
 3.65%
 6.76%
 68.47%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
46° 53' 2.3" North, 124° 10' 48.4" East
46° 24' 4.5" North, 124° 52' 59.6" East
45° 54' 51.2" North, 125° 35' 10.9" East
Some cities around Honggang sort by population:
• Fendou
		26.8 km =16.7 mi, 
356°
• Daqing
		22.1 km =13.7 mi, 
23°
• Anda
		33.1 km =20.6 mi, 
89°
• Zhaodong
		92.3 km =57.4 mi, 
113°
• Longfeng
		22.3 km =13.9 mi, 
49°
• Qinggang
		98.7 km =61.3 mi, 
71°
• Zhaozhou
		86.6 km =53.8 mi, 
157°
• Taikang
		61.3 km =38.1 mi, 
326°
Sources (retrieved 2019-11-25):
» NASA, Earths city lights 1995
» NASA city lights 2003
» Earth at Night: Flat Maps 2012, 2016