Night Light of Godfrey (Illinois) from space (United States) Src. Average luminocity for 10x10km area is 41.4838% and for 50x50km: 26.8939%.
Square area 10x10 km:
 5.03%
 5.03%
 6.33%
 5.03%
 11.04%
 6.82%
 5.68%
 6.01%
 11.04%
 25.65%
 12.34%Square area 50x50 km:
 4.6%
 5.44%
 4.29%
 3.34%
 4.74%
 4.23%
 3.4%
 3.14%
 5.57%
 6.27%
 54.99%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
39° 30' 0.9" North, 90° 53' 23.7" West
38° 57' 20.2" North, 90° 11' 12.4" West
38° 24' 24.2" North, 89° 29' 1.2" West
Some cities around Godfrey sort by population:
• Upper Alton
		5.8 km =3.6 mi, 
147°
• Alton
		7.2 km =4.5 mi, 
178°
• Spanish Lake
		18.8 km =11.7 mi, 
187°
• Old Jamestown
		15.9 km =9.9 mi, 
212°
• Wood River
		13 km =8.1 mi, 
143°
• Bethalto
		13.7 km =8.5 mi, 
112°
• Black Jack
		19.3 km =12 mi, 
201°
• East Alton
		10.6 km =6.6 mi, 
142°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016