Night Light of Coleraine (Northern Ireland) from space (United Kingdom) Src. Average luminocity for 10x10km area is 17.7619% and for 50x50km: 1.8103%.
Square area 10x10 km:
 3.38%
 3.63%
 0.5%
 1.63%
 3.26%
 0.88%
 0.63%
 1.88%
 0.5%
 25.19%
 58.52%Square area 50x50 km:
 0.23%
 0.25%
 0.09%
 0.18%
 0.43%
 0.19%
 0.27%
 0.23%
 0.26%
 1.28%
 96.58%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
55° 31' 59.7" North, 7° 22' 11.3" West
55° 7' 60" North, 6° 40' 0" West
54° 43' 45.7" North, 5° 57' 48.8" West
Some cities around Coleraine sort by population:
• Derry
		43.6 km =27.1 mi, 
249°
• Ballymena
		39 km =24.2 mi, 
140°
• Limavady
		20.3 km =12.6 mi, 
242°
• Ballymoney
		12.1 km =7.5 mi, 
124°
• Magherafelt
		42.4 km =26.3 mi, 
174°
• Portstewart
		6.1 km =3.8 mi, 
330°
• Portrush
		7 km =4.3 mi, 
9°
• Ballycastle
		28 km =17.4 mi, 
73°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016