Night Light of Ballston Spa (New York) from space (United States) Src. Average luminocity for 10x10km area is 27.046% and for 50x50km: 13.3965%.
Square area 10x10 km:
 1.9%
 2.38%
 3.02%
 3.81%
 4.29%
 4.13%
 6.03%
 4.13%
 10.16%
 32.38%
 27.78%Square area 50x50 km:
 1.41%
 1.9%
 1.35%
 1.55%
 1.77%
 1.79%
 3.18%
 2.65%
 5.37%
 9.76%
 69.26%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
43° 30' 46.7" North, 74° 33' 7.7" West
43° 0' 3.3" North, 73° 50' 56.4" West
42° 29' 4.3" North, 73° 8' 45.2" West
Some cities around Ballston Spa sort by population:
• Schenectady
		22 km =13.7 mi, 
199°
• Saratoga Springs
		10.5 km =6.5 mi, 
29°
• Rotterdam
		25.8 km =16 mi, 
202°
• Cohoes
		28 km =17.4 mi, 
154°
• Scotia
		21.5 km =13.4 mi, 
205°
• East Glenville
		13.5 km =8.4 mi, 
208°
• Mechanicville
		17.1 km =10.6 mi, 
129°
• Northumberland
		25.4 km =15.8 mi, 
56°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016