Night Light of Saint-Péray (Auvergne-Rhône-Alpes) from space (France) Src. Average luminocity for 10x10km area is 43.9143% and for 50x50km: 10.8846%.
Square area 10x10 km:
 10.48%
 12.86%
 6.03%
 3.33%
 2.86%
 3.33%
 3.65%
 4.44%
 13.49%
 16.51%
 23.02%Square area 50x50 km:
 1.48%
 2.15%
 0.95%
 1.08%
 1.16%
 1.21%
 1.54%
 1.33%
 3.14%
 9.71%
 76.25%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
45° 26' 38.9" North, 4° 8' 31.1" East
44° 56' 55.2" North, 4° 50' 42.4" East
44° 26' 55.9" North, 5° 32' 53.6" East
Some cities around Saint-Péray sort by population:
• Valence
		5.7 km =3.5 mi, 
116°
• Bourg-lès-Valence
		3.9 km =2.4 mi, 
92°
• Guilherand-Granges
		2.9 km =1.8 mi, 
128°
• Tournon-sur-Rhône
		13.2 km =8.2 mi, 
355°
• Portes-lès-Valence
		8.4 km =5.2 mi, 
164°
• Chabeuil
		14.5 km =9 mi, 
112°
• Tain-l’Hermitage
		13.2 km =8.2 mi, 
3°
• La Voulte-sur-Rhône
		17.4 km =10.8 mi, 
197°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016