Night Light of Pennādam (Tamil Nadu) from space (India) Src. Average luminocity for 10x10km area is 21.3442% and for 50x50km: 10.4072%.
Square area 10x10 km:
 0.22%
 1.95%
 4.11%
 3.68%
 2.16%
 3.03%
 5.41%
 2.6%
 7.58%
 21.65%
 47.62%Square area 50x50 km:
 0.46%
 1.87%
 1.35%
 1.02%
 0.8%
 1.41%
 2.16%
 2.55%
 4.19%
 6.74%
 77.46%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
12° 5' 32.2" North, 78° 32' 18.4" East
11° 24' 14" North, 79° 14' 29.6" East
10° 42' 49.8" North, 79° 56' 40.9" East
Some cities around Pennādam sort by population:
• Vriddhāchalam
		15.6 km =9.7 mi, 
35°
• Jayamkondacholapuram
		25.1 km =15.6 mi, 
147°
• Perambalur
		43.4 km =27 mi, 
244°
• Ariyalūr
		34.6 km =21.5 mi, 
211°
• Kurinjippādi
		41.4 km =25.7 mi, 
66°
• Kīl Bhuvanagiri
		44.5 km =27.7 mi, 
84°
• Srīmushnam
		17.7 km =11 mi, 
90°
• Māttūr
		10.1 km =6.3 mi, 
204°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016