Night Light of Mount Colah (New South Wales) from space (Australia) Src. Average luminocity for 10x10km area is 37.6685% and for 50x50km: 36.9945%.
Square area 10x10 km:
 3.66%
 3.48%
 0.92%
 6.04%
 14.65%
 6.04%
 3.85%
 9.16%
 14.65%
 24.91%
 12.64%Square area 50x50 km:
 8.24%
 9.21%
 5.18%
 6.64%
 7.1%
 3.02%
 1.96%
 2.6%
 3.75%
 7.17%
 45.13%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
33° 5' 46.5" South, 150° 24' 48.8" East
33° 40' 60" South, 151° 7' 0" East
34° 15' 59.1" South, 151° 49' 11.3" East
Some cities around Mount Colah sort by population:
• Hornsby
		2.7 km =1.7 mi, 
217°
• Wahroonga
		3.9 km =2.4 mi, 
181°
• Saint Ives
		6.5 km =4 mi, 
142°
• Turramurra
		5.7 km =3.5 mi, 
168°
• Thornleigh
		6.5 km =4 mi, 
212°
• Hornsby Heights
		2.5 km =1.6 mi, 
302°
• Waitara
		3.3 km =2.1 mi, 
201°
• Normanhurst
		4.9 km =3 mi, 
203°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016