Night Light of Heidelberg (Victoria) from space (Australia) Src. Average luminocity for 10x10km area is 80.9456% and for 50x50km: 50.376%.
Square area 10x10 km:
 13.44%
 22.45%
 19.39%
 20.58%
 13.78%
 7.48%
 2.55%
 0.34%
 0%
 0%
 0%Square area 50x50 km:
 13.39%
 12.16%
 6.32%
 8.8%
 7.39%
 4.87%
 3.79%
 3.38%
 5.74%
 8.12%
 26.05%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
37° 11' 31.1" South, 144° 21' 48.8" East
37° 45' 0" South, 145° 4' 0" East
38° 18' 13.9" South, 145° 46' 11.3" East
Some cities around Heidelberg sort by population:
• Preston
		4.4 km =2.7 mi, 
270°
• Templestowe Lower
		4.8 km =3 mi, 
112°
• Ivanhoe
		3 km =1.9 mi, 
224°
• Bulleen
		2.4 km =1.5 mi, 
141°
• Macleod
		1.9 km =1.2 mi, 
0°
• Rosanna
		1.2 km =0.7 mi, 
2°
• Viewbank
		2.6 km =1.6 mi, 
64°
• Watsonia
		4 km =2.5 mi, 
21°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016