Night Light of Chennai (Tamil Nadu) from space (India) Src. Average luminocity for 10x10km area is 87.5671% and for 50x50km: 50.4284%.
Square area 10x10 km:
 60.61%
 10.17%
 5.41%
 1.08%
 6.06%
 8.87%
 3.25%
 2.81%
 1.73%
 0%
 0%Square area 50x50 km:
 15.72%
 14.24%
 12.18%
 3.19%
 3.65%
 4.96%
 2.56%
 2.2%
 2.95%
 3.69%
 34.65%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
13° 46' 18.2" North, 79° 34' 31.3" East
13° 5' 16.2" North, 80° 16' 42.5" East
12° 24' 7.3" North, 80° 58' 53.8" East
Some cities around Chennai sort by population:
• Ambattūr
		12.7 km =7.9 mi, 
275°
• Tiruvottiyūr
		8.2 km =5.1 mi, 
17°
• Alandur
		12.3 km =7.6 mi, 
219°
• Saint Thomas Mount
		13 km =8.1 mi, 
223°
• Manali
		8.9 km =5.5 mi, 
351°
• Chetput
		4.5 km =2.8 mi, 
244°
• Chinnasekkadu
		8.4 km =5.2 mi, 
344°
• Gāndhī Nagar
		9.4 km =5.8 mi, 
196°
Sources (retrieved 2019-11-25):
» NASA, Earths city lights 1995
» NASA city lights 2003
» Earth at Night: Flat Maps 2012, 2016