Night Light of Mount Merrion (Leinster) from space (Ireland) Src. Average luminocity for 10x10km area is 84.0884% and for 50x50km: 22.6673%.
Square area 10x10 km:
 45.96%
 22.85%
 4.29%
 3.28%
 2.9%
 2.9%
 4.42%
 9.47%
 3.91%
 0%
 0%Square area 50x50 km:
 8.12%
 5.22%
 1.59%
 1.6%
 1.6%
 1.47%
 2.11%
 2.61%
 5.13%
 9.02%
 61.53%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
53° 43' 5.6" North, 6° 55' 5.4" West
53° 18' 0.3" North, 6° 12' 54.1" West
52° 52' 40.1" North, 5° 30' 42.9" West
Some cities around Mount Merrion sort by population:
• Sandyford
		2.9 km =1.8 mi, 
193°
• Dundrum
		3 km =1.9 mi, 
249°
• Donnybrook
		1.6 km =1 mi, 
341°
• Balally
		3.1 km =1.9 mi, 
206°
• Sandymount
		3.2 km =2 mi, 
351°
• Blackrock
		2.5 km =1.6 mi, 
86°
• Ballinteer
		3.9 km =2.4 mi, 
221°
• Booterstown
		1.1 km =0.7 mi, 
64°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016