Night Light of Kungälv (Västra Götaland) from space (Sweden) Src. Average luminocity for 10x10km area is 41.9167% and for 50x50km: 18.1039%.
Square area 10x10 km:
 9.52%
 9.64%
 4.29%
 3.21%
 3.21%
 1.9%
 1.55%
 5.12%
 25.71%
 34.76%
 1.07%Square area 50x50 km:
 5.85%
 4.51%
 1.25%
 1.19%
 1.24%
 1.31%
 1.46%
 2.04%
 3.65%
 8.44%
 69.06%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
58° 14' 34.7" North, 11° 16' 38.7" East
57° 52' 15.5" North, 11° 58' 49.9" East
57° 29' 42.3" North, 12° 41' 1.2" East
Some cities around Kungälv sort by population:
• Göteborg
		18.2 km =11.3 mi, 
182°
• Partille
		16.4 km =10.2 mi, 
152°
• Björlanda
		14.5 km =9 mi, 
216°
• Gårdsten
		7.9 km =4.9 mi, 
158°
• Hammarkullen
		10.6 km =6.6 mi, 
161°
• Lövgärdet
		7.1 km =4.4 mi, 
150°
• Gråbo
		19.3 km =12 mi, 
101°
• Surte
		5.5 km =3.4 mi, 
157°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016