Night Light of Tsimlyansk (Rostov) from space (Russia) Src. Average luminocity for 10x10km area is 4.9464% and for 50x50km: 2.9526%.
Square area 10x10 km:
 0%
 0.3%
 0.3%
 0.6%
 1.49%
 1.64%
 1.04%
 1.34%
 1.19%
 0.74%
 91.37%Square area 50x50 km:
 0.71%
 0.76%
 0.18%
 0.12%
 0.26%
 0.25%
 0.12%
 0.13%
 0.97%
 2.46%
 94.05%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
48° 7' 3.6" North, 41° 23' 55.8" East
47° 38' 46" North, 42° 6' 7" East
47° 10' 12.9" North, 42° 48' 18.3" East
Some cities around Tsimlyansk sort by population:
• Volgodonsk
		15.2 km =9.4 mi, 
165°
• Morozovsk
		81.4 km =50.6 mi, 
345°
• Kotel’nikovo
		77.8 km =48.3 mi, 
91°
• Konstantinovsk
		76 km =47.2 mi, 
264°
• Zimovniki
		62.1 km =38.6 mi, 
153°
• Dubovskoye
		56.4 km =35 mi, 
117°
• Romanovskaya
		12.8 km =8 mi, 
205°
• Krasnoyarskaya
		4.3 km =2.7 mi, 
275°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016