Night Light of Opwijk (Flanders) from space (Belgium) Src. Average luminocity for 10x10km area is 42.6835% and for 50x50km: 57.6703%.
Square area 10x10 km:
 1.12%
 3.92%
 3.08%
 3.36%
 7.56%
 7.56%
 18.21%
 18.21%
 36.55%
 0.42%
 0%Square area 50x50 km:
 12.57%
 10.53%
 5.62%
 7.02%
 9.06%
 10.31%
 11.77%
 10.91%
 13.52%
 7.64%
 1.05%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
51° 24' 28.6" North, 3° 28' 52.6" East
50° 58' 2.1" North, 4° 11' 3.9" East
50° 31' 20.4" North, 4° 53' 15.1" East
Some cities around Opwijk sort by population:
• Dendermonde
		9 km =5.6 mi, 
319°
• Asse
		6.4 km =4 mi, 
171°
• Meise
		10.4 km =6.5 mi, 
107°
• Lebbeke
		5.4 km =3.4 mi, 
320°
• Londerzeel
		9.3 km =5.8 mi, 
63°
• Merchtem
		3.8 km =2.4 mi, 
118°
• Buggenhout
		5.5 km =3.4 mi, 
12°
• Sint-Amands
		10.1 km =6.3 mi, 
10°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016