Night Light of Tarkhovka (St.-Petersburg) from space (Russia) Src. Average luminocity for 10x10km area is 35.7521% and for 50x50km: 35.9031%.
Square area 10x10 km:
 4.86%
 8.68%
 5.37%
 3.31%
 2.89%
 2.17%
 2.58%
 4.65%
 19.21%
 30.68%
 15.6%Square area 50x50 km:
 14.1%
 6.54%
 3.1%
 3.96%
 3.82%
 1.71%
 1.05%
 2.28%
 8.71%
 15.88%
 38.85%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
60° 24' 57.1" North, 29° 16' 16.4" East
60° 4' 0.7" North, 29° 58' 27.7" East
59° 42' 50.9" North, 30° 40' 38.9" East
Some cities around Tarkhovka sort by population:
• Kurortnyy
		11.6 km =7.2 mi, 
341°
• Untolovo
		14.4 km =8.9 mi, 
115°
• Sertolovo
		15.3 km =9.5 mi, 
55°
• Kronstadt
		14 km =8.7 mi, 
235°
• Sestroretsk
		3.5 km =2.2 mi, 
350°
• Pargolovo
		16.8 km =10.4 mi, 
84°
• Lakhtinskiy
		12.5 km =7.8 mi, 
129°
• Pesochnyy
		12.2 km =7.6 mi, 
59°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016