Night Light of Bourg-lès-Valence (Auvergne-Rhône-Alpes) from space (France) Src. Average luminocity for 10x10km area is 65.3% and for 50x50km: 10.9634%.
Square area 10x10 km:
 17.14%
 20.32%
 7.46%
 5.87%
 3.97%
 6.35%
 7.78%
 9.52%
 19.05%
 2.54%
 0%Square area 50x50 km:
 1.48%
 2.2%
 0.97%
 1.11%
 1.19%
 1.2%
 1.54%
 1.31%
 3.12%
 9.73%
 76.16%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
45° 26' 33.1" North, 4° 11' 29.4" East
44° 56' 49.3" North, 4° 53' 40.7" East
44° 26' 50" North, 5° 35' 51.9" East
Some cities around Bourg-lès-Valence sort by population:
• Valence
		2.7 km =1.7 mi, 
153°
• Romans-sur-Isère
		17.7 km =11 mi, 
49°
• Guilherand-Granges
		2.3 km =1.4 mi, 
226°
• Tournon-sur-Rhône
		14.1 km =8.8 mi, 
340°
• Portes-lès-Valence
		8.1 km =5 mi, 
191°
• Saint-Péray
		3.9 km =2.4 mi, 
272°
• Chabeuil
		10.9 km =6.8 mi, 
119°
• Tain-l’Hermitage
		13.7 km =8.5 mi, 
347°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016