Night Light of Gryazi (Lipetsk Oblast) from space (Russia) Src. Average luminocity for 10x10km area is 15.914% and for 50x50km: 6.4101%.
Square area 10x10 km:
 0.93%
 1.98%
 2.38%
 1.59%
 1.59%
 2.65%
 3.04%
 2.91%
 4.63%
 5.82%
 72.49%Square area 50x50 km:
 1.25%
 1.27%
 0.53%
 0.78%
 0.69%
 0.66%
 0.72%
 0.96%
 1.74%
 4.25%
 87.16%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
52° 55' 21.2" North, 39° 13' 58.1" East
52° 29' 47.7" North, 39° 56' 9.3" East
52° 3' 59.1" North, 40° 38' 20.6" East
Some cities around Gryazi sort by population:
• Lipetsk
		27.4 km =17 mi, 
295°
• Michurinsk
		58.2 km =36.2 mi, 
39°
• Usman’
		52 km =32.3 mi, 
195°
• Dobrinka
		51.9 km =32.2 mi, 
135°
• Khlevnoye
		66.3 km =41.2 mi, 
239°
• Borinskoye
		38.5 km =23.9 mi, 
263°
• Zavoronezhskoye
		59.5 km =37 mi, 
44°
• Dobroye
		42.1 km =26.2 mi, 
348°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016