Night Light of Sayansk (Irkutsk Oblast) from space (Russia) Src. Average luminocity for 10x10km area is 13.7765% and for 50x50km: 2.0515%.
Square area 10x10 km:
 3.03%
 3.16%
 0.88%
 0.51%
 1.89%
 1.52%
 0.63%
 0.51%
 0.63%
 7.32%
 79.92%Square area 50x50 km:
 0.31%
 0.4%
 0.16%
 0.13%
 0.36%
 0.22%
 0.23%
 0.2%
 0.18%
 1.49%
 96.33%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
54° 31' 8.3" North, 101° 27' 42" East
54° 6' 31.7" North, 102° 9' 53.3" East
53° 41' 40.3" North, 102° 52' 4.5" East
Some cities around Sayansk sort by population:
• Cheremkhovo
		121.5 km =75.5 mi, 
150°
• Tulun
		114.4 km =71.1 mi, 
296°
• Zima
		22.4 km =13.9 mi, 
200°
• Svirsk
		137.4 km =85.4 mi, 
145°
• Kuytun
		49.9 km =31 mi, 
301°
• Zalari
		65.2 km =40.5 mi, 
159°
• Kutulik
		93.6 km =58.2 mi, 
154°
• Ust’-Uda
		56.8 km =35.3 mi, 
82°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016