Night Light of Clydach (Wales) from space (United Kingdom) Src. Average luminocity for 10x10km area is 37.7815% and for 50x50km: 8.9647%.
Square area 10x10 km:
 4.48%
 6.72%
 1.68%
 7.42%
 7%
 6.16%
 3.5%
 6.16%
 16.53%
 24.51%
 15.83%Square area 50x50 km:
 1.1%
 1.4%
 0.79%
 1.17%
 1.27%
 1.03%
 1.11%
 1.2%
 3.06%
 8.17%
 79.7%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
52° 7' 1.8" North, 4° 36' 11.3" West
51° 40' 60" North, 3° 54' 0" West
51° 14' 43" North, 3° 11' 48.8" West
Some cities around Clydach sort by population:
• Swansea
		7.6 km =4.7 mi, 
203°
• Neath
		7 km =4.3 mi, 
108°
• Briton Ferry
		8.1 km =5 mi, 
136°
• Gorseinon
		9.9 km =6.2 mi, 
260°
• Ystalyfera
		12.4 km =7.7 mi, 
41°
• Pontarddulais
		10.2 km =6.3 mi, 
289°
• Brynamman
		13.2 km =8.2 mi, 
10°
• Cwmafan
		12.1 km =7.5 mi, 
127°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016