Night Light of Périgueux (Nouvelle-Aquitaine) from space (France) Src. Average luminocity for 10x10km area is 36.4106% and for 50x50km: 2.6585%.
Square area 10x10 km:
 6.97%
 7.88%
 3.64%
 1.82%
 3.33%
 7.27%
 3.64%
 3.33%
 6.36%
 44.7%
 11.06%Square area 50x50 km:
 0.31%
 0.36%
 0.21%
 0.26%
 0.38%
 0.52%
 0.37%
 0.37%
 0.55%
 2.39%
 94.28%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
45° 40' 36.3" North, 0° 0' 48.7" East
45° 10' 60" North, 0° 43' 0" East
44° 41' 8.1" North, 1° 25' 11.2" East
Some cities around Périgueux sort by population:
• Bergerac
		41.3 km =25.7 mi, 
206°
• Sarlat-la-Canéda
		51.1 km =31.8 mi, 
129°
• Coulounieix-Chamiers
		4 km =2.5 mi, 
213°
• Saint-Yrieix-la-Perche
		52.9 km =32.9 mi, 
45°
• Trélissac
		5.7 km =3.5 mi, 
73°
• Boulazac
		7.9 km =4.9 mi, 
160°
• Terrasson-Lavilledieu
		46.2 km =28.7 mi, 
97°
• Montpon-Ménestérol
		47.7 km =29.6 mi, 
244°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016