Night Light of Arcos (Aveiro) from space (Portugal) Src. Average luminocity for 10x10km area is 41.3503% and for 50x50km: 22.3037%.
Square area 10x10 km:
 2.72%
 9.18%
 6.12%
 4.93%
 6.29%
 8.5%
 2.21%
 3.74%
 27.04%
 22.45%
 6.8%Square area 50x50 km:
 1.93%
 2.86%
 2.48%
 1.94%
 3.47%
 4.64%
 3.48%
 6.19%
 10.58%
 13.87%
 48.57%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
40° 58' 50.6" North, 9° 8' 41.4" West
40° 26' 52" North, 8° 26' 30.2" West
39° 54' 38.1" North, 7° 44' 18.9" West
Some cities around Arcos sort by population:
• Águeda
		14.4 km =8.9 mi, 
359°
• Mira
		25.1 km =15.6 mi, 
265°
• Cantanhede
		17.1 km =10.6 mi, 
228°
• Oiã
		13.4 km =8.3 mi, 
322°
• Oliveira do Bairro
		8.6 km =5.3 mi, 
329°
• Eixo
		22.7 km =14.1 mi, 
331°
• Arazede
		25.2 km =15.7 mi, 
224°
• Valongo
		18.8 km =11.7 mi, 
357°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016