Night Light of Heiloo (North Holland) from space (Netherlands) Src. Average luminocity for 10x10km area is 31.9444% and for 50x50km: 18.221%.
Square area 10x10 km:
 6.48%
 6.48% 6.61%
 6.61% 1.72%
 1.72% 3.04%
 3.04% 3.7%
 3.7% 5.69%
 5.69% 1.98%
 1.98% 2.38%
 2.38% 12.3%
 12.3% 28.31%
 28.31% 27.78%
 27.78%Square area 50x50 km:
 4.56%
 4.56% 4.07%
 4.07% 1.44%
 1.44% 1.34%
 1.34% 1.54%
 1.54% 1.64%
 1.64% 1.57%
 1.57% 2.65%
 2.65% 6.31%
 6.31% 11.58%
 11.58% 63.3%
 63.3%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
53° 1' 38.9" North, 3° 59' 6.1" East
52° 36' 9.1" North, 4° 41' 17.3" East
52° 10' 24.2" North, 5° 23' 28.6" East
Some cities around Heiloo sort by population:
• Alkmaar
		5.2 km =3.2 mi,  51°
51°
• Heemskerk
		10.2 km =6.3 mi,  186°
186°
• Castricum
		6.2 km =3.9 mi,  191°
191°
• Uitgeest
		8.3 km =5.2 mi,  169°
169°
• Limmen
		3.7 km =2.3 mi,  173°
173°
• Zuid-Scharwoude
		12.4 km =7.7 mi,  40°
40°
• Sint Pancras
		9.1 km =5.7 mi,  45°
45°
• Broek op Langedijk
		11.2 km =7 mi,  44°
44°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016