Night Light of Ferreiras (Faro) from space (Portugal) Src. Average luminocity for 10x10km area is 62.6786% and for 50x50km: 17.412%.
Square area 10x10 km:
 9.69%
 11.39%
 9.52%
 6.29%
 19.22%
 10.2%
 9.86%
 12.59%
 11.22%
 0%
 0%Square area 50x50 km:
 1.53%
 1.85%
 2.87%
 2.25%
 4.14%
 2.55%
 2.54%
 3.45%
 6.22%
 9.63%
 62.97%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
37° 41' 15.9" North, 8° 56' 26.6" West
37° 7' 45.3" North, 8° 14' 15.3" West
36° 33' 59.8" North, 7° 32' 4.1" West
Some cities around Ferreiras sort by population:
• Loulé
		19.3 km =12 mi, 
87°
• Quarteira
		13.8 km =8.6 mi, 
118°
• Albufeira
		4.7 km =2.9 mi, 
193°
• Silves
		19 km =11.8 mi, 
290°
• Almancil
		18.9 km =11.7 mi, 
104°
• Estômbar
		22 km =13.7 mi, 
274°
• São Bartolomeu de Messines
		14.8 km =9.2 mi, 
342°
• Lagoa
		19.1 km =11.9 mi, 
272°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016