Night Light of Wielki Kack (Pomerania) from space (Poland) Src. Average luminocity for 10x10km area is 56.0825% and for 50x50km: 19.6958%.
Square area 10x10 km:
 14.71%
 16.63%
 2.75%
 2.99%
 3.59%
 5.02%
 6.22%
 22.97%
 13.64%
 11.48%
 0%Square area 50x50 km:
 5.47%
 4.58%
 1.08%
 1.37%
 1.59%
 1.69%
 2.27%
 3.87%
 5.2%
 10.08%
 62.81%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
54° 52' 26.9" North, 17° 47' 5.9" East
54° 28' 3.1" North, 18° 29' 17.2" East
54° 3' 24.7" North, 19° 11' 28.4" East
Some cities around Wielki Kack sort by population:
• Gdańsk
		16.4 km =10.2 mi, 
141°
• Gdynia
		6.4 km =4 mi, 
26°
• Wejherowo
		22.4 km =13.9 mi, 
313°
• Rumia
		13.2 km =8.2 mi, 
330°
• Sopot
		5.5 km =3.4 mi, 
121°
• Reda
		17.8 km =11.1 mi, 
329°
• Kartuzy
		24 km =14.9 mi, 
231°
• Żukowo
		16.1 km =10 mi, 
209°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016