Night Light of Vaals (Limburg) from space (Netherlands) Src. Average luminocity for 10x10km area is 32.6793% and for 50x50km: 24.9579%.
Square area 10x10 km:
 7.56%
 6.44%
 2.94%
 2.1%
 3.08%
 3.5%
 2.24%
 4.34%
 17.51%
 22.13%
 28.15%Square area 50x50 km:
 3.57%
 4.81%
 2.31%
 2.34%
 3.26%
 3.57%
 3.47%
 4.88%
 9.31%
 18.27%
 44.22%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
51° 12' 48.2" North, 5° 18' 53.7" East
50° 46' 15" North, 6° 1' 5" East
50° 19' 26.5" North, 6° 43' 16.2" East
Some cities around Vaals sort by population:
• Aachen, DE
		4.6 km =2.9 mi, 
81°
• Heerlen
		12.8 km =8 mi, 
348°
• Kerkrade
		11 km =6.8 mi, 
16°
• Herzogenrath, DE
		12.1 km =7.5 mi, 
25°
• Würselen, DE
		9.7 km =6 mi, 
57°
• La Calamine, BE
		5.9 km =3.7 mi, 
184°
• Plombières, BE
		5.6 km =3.5 mi, 
227°
• Welkenraedt, BE
		12.7 km =7.9 mi, 
195°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016