Night Light of Tulun (Irkutsk Oblast) from space (Russia) Src. Average luminocity for 10x10km area is 32.3577% and for 50x50km: 1.8328%.
Square area 10x10 km:
 8.37%
 7.89%
 2.27%
 2.03%
 1.67%
 2.87%
 4.55%
 1.08%
 6.22%
 34.81%
 28.23%Square area 50x50 km:
 0.36%
 0.34%
 0.1%
 0.08%
 0.21%
 0.2%
 0.28%
 0.17%
 0.32%
 1.9%
 96.04%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
54° 58' 9.2" North, 99° 52' 41.9" East
54° 33' 48.9" North, 100° 34' 53.1" East
54° 9' 13.9" North, 101° 17' 4.4" East
Some cities around Tulun sort by population:
• Sayansk
		114.4 km =71.1 mi, 
116°
• Nizhneudinsk
		106.8 km =66.4 mi, 
290°
• Zima
		119 km =73.9 mi, 
126°
• Vikhorevka
		177.3 km =110.2 mi, 
12°
• Kuytun
		64.8 km =40.3 mi, 
112°
• Zalari
		168.1 km =104.5 mi, 
131°
• Alzamay
		164.6 km =102.3 mi, 
312°
• Ust’-Uda
		164.4 km =102.2 mi, 
105°
Sources (retrieved 2019-11-25):
» NASA, Earths city lights 1995
» NASA city lights 2003
» Earth at Night: Flat Maps 2012, 2016