Night Light of Monthey (Valais) from space (Switzerland) Src. Average luminocity for 10x10km area is 20.244% and for 50x50km: 6.0733%.
Square area 10x10 km:
 2.98%
 4.17%
 1.79%
 0.45%
 2.83%
 2.68%
 1.93%
 3.13%
 1.34%
 24.85%
 53.87%Square area 50x50 km:
 0.46%
 0.81%
 0.62%
 0.72%
 0.73%
 0.97%
 1.1%
 0.79%
 0.61%
 3.69%
 89.5%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
46° 44' 18.7" North, 6° 15' 3.4" East
46° 15' 16.2" North, 6° 57' 14.6" East
45° 45' 58.2" North, 7° 39' 25.9" East
Some cities around Monthey sort by population:
• Montreux
		20.1 km =12.5 mi, 
350°
• Martigny-Ville
		19.2 km =11.9 mi, 
151°
• La Tour-de-Peilz
		23.3 km =14.5 mi, 
341°
• Aigle
		7.1 km =4.4 mi, 
6°
• Ollon
		5.4 km =3.4 mi, 
33°
• Bex
		4.3 km =2.7 mi, 
97°
• Collombey
		2.2 km =1.4 mi, 
347°
• Fully
		17.9 km =11.1 mi, 
136°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016