Night Light of Illkirch-Graffenstaden (Grand Est) from space (France) Src. Average luminocity for 10x10km area is 71.0341% and for 50x50km: 21.96%.
Square area 10x10 km:
 26.42%
 21.88%
 3.98%
 4.83%
 4.83%
 4.55%
 4.83%
 15.63%
 10.94%
 2.13%
 0%Square area 50x50 km:
 4.66%
 4.26%
 1.6%
 1.49%
 1.91%
 2.02%
 2.4%
 3.51%
 6.04%
 19.94%
 52.18%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
48° 59' 32.8" North, 7° 0' 43.6" East
48° 31' 44.2" North, 7° 42' 54.8" East
48° 3' 40.2" North, 8° 25' 6.1" East
Some cities around Illkirch-Graffenstaden sort by population:
• Strasbourg
		6.5 km =4 mi, 
20°
• Kehl, DE
		8.8 km =5.5 mi, 
56°
• Schiltigheim
		9.1 km =5.7 mi, 
16°
• Bischheim
		10.1 km =6.3 mi, 
16°
• Lingolsheim
		4 km =2.5 mi, 
322°
• Ostwald
		1.7 km =1.1 mi, 
349°
• Geispolsheim
		5.1 km =3.2 mi, 
253°
• Eckbolsheim
		6.1 km =3.8 mi, 
340°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016