Night Light of Hellevoetsluis (South Holland) from space (Netherlands) Src. Average luminocity for 10x10km area is 20.3627% and for 50x50km: 28.0084%.
Square area 10x10 km:
 1.54%
 1.54% 2.24%
 2.24% 1.82%
 1.82% 0.84%
 0.84% 4.76%
 4.76% 0.84%
 0.84% 2.52%
 2.52% 3.5%
 3.5% 13.45%
 13.45% 23.81%
 23.81% 44.68%
 44.68%Square area 50x50 km:
 12.76%
 12.76% 6.65%
 6.65% 1.38%
 1.38% 1.98%
 1.98% 2.6%
 2.6% 1.69%
 1.69% 1.42%
 1.42% 2.21%
 2.21% 3.36%
 3.36% 4.54%
 4.54% 61.39%
 61.39%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
52° 15' 56.6" North, 3° 25' 48.7" East
51° 49' 60" North, 4° 7' 60" East
51° 23' 48.2" North, 4° 50' 11.2" East
Some cities around Hellevoetsluis sort by population:
• Spijkenisse
		13.5 km =8.4 mi,  84°
84°
• Vlaardingen
		16.8 km =10.4 mi,  58°
58°
• Maassluis
		12.8 km =8 mi,  38°
38°
• Middelharnis
		8.7 km =5.4 mi,  165°
165°
• Rozenburg
		11.2 km =7 mi,  45°
45°
• Goedereede
		10.6 km =6.6 mi,  260°
260°
• Hoek van Holland
		16 km =9.9 mi,  0°
0°
• Ouddorp
		13.9 km =8.6 mi,  259°
259°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016