Night Light of De Bilt (Utrecht) from space (Netherlands) Src. Average luminocity for 10x10km area is 54.2183% and for 50x50km: 26.9509%.
Square area 10x10 km:
 15.34%
 15.34% 7.94%
 7.94% 6.08%
 6.08% 5.03%
 5.03% 5.95%
 5.95% 5.82%
 5.82% 10.58%
 10.58% 10.71%
 10.71% 21.56%
 21.56% 10.98%
 10.98% 0%
 0%Square area 50x50 km:
 5.8%
 5.8% 5.14%
 5.14% 2.35%
 2.35% 2.45%
 2.45% 2.62%
 2.62% 2.55%
 2.55% 2.96%
 2.96% 3.76%
 3.76% 9.2%
 9.2% 19.72%
 19.72% 43.46%
 43.46%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
52° 32' 23" North, 4° 28' 38.8" East
52° 6' 36" North, 5° 10' 50" East
51° 40' 33.9" North, 5° 53' 1.3" East
Some cities around De Bilt sort by population:
• Utrecht
		4.5 km =2.8 mi,  241°
241°
• Zeist
		4.2 km =2.6 mi,  121°
121°
• Soest
		10.3 km =6.4 mi,  47°
47°
• Maarssen
		10 km =6.2 mi,  288°
288°
• Driebergen-Rijsenburg
		9.3 km =5.8 mi,  132°
132°
• Lunetten
		6.2 km =3.9 mi,  210°
210°
• Bunnik
		5 km =3.1 mi,  165°
165°
• Odijk
		7.4 km =4.6 mi,  149°
149°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016