Night Light of Gorseinon (Wales) from space (United Kingdom) Src. Average luminocity for 10x10km area is 26.6162% and for 50x50km: 7.8031%.
Square area 10x10 km:
 1.54%
 2.94%
 1.54%
 2.1%
 6.02%
 6.02%
 4.62%
 4.62%
 12.46%
 29.27%
 28.85%Square area 50x50 km:
 0.96%
 1.25%
 0.68%
 0.94%
 1.07%
 0.98%
 0.98%
 1.15%
 2.91%
 6.63%
 82.46%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
52° 6' 11.8" North, 4° 44' 41.1" West
51° 40' 9.5" North, 4° 2' 29.9" West
51° 13' 52.1" North, 3° 20' 18.6" West
Some cities around Gorseinon sort by population:
• Swansea
		8.7 km =5.4 mi, 
128°
• Llanelli
		8.4 km =5.2 mi, 
279°
• Neath
		16.4 km =10.2 mi, 
92°
• Briton Ferry
		15.9 km =9.9 mi, 
105°
• Ammanford
		14.2 km =8.8 mi, 
14°
• Clydach
		9.9 km =6.2 mi, 
80°
• Pontarddulais
		5 km =3.1 mi, 
2°
• Burry Port
		14.2 km =8.8 mi, 
276°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016