Night Light of Tournai (Wallonia) from space (Belgium) Src. Average luminocity for 10x10km area is 52.7166% and for 50x50km: 37.5283%.
Square area 10x10 km:
 8.96%
 10.43%
 7.09%
 4.81%
 8.82%
 7.22%
 6.28%
 10.7%
 26.74%
 8.96%
 0%Square area 50x50 km:
 8.99%
 6.58%
 2.85%
 3.8%
 4.97%
 5%
 5.27%
 5.65%
 11.67%
 20.46%
 24.75%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
51° 3' 4.5" North, 2° 41' 10.3" East
50° 36' 25.7" North, 3° 23' 21.6" East
50° 9' 31.7" North, 4° 5' 32.8" East
Some cities around Tournai sort by population:
• Villeneuve-d'Ascq, FR
		15.7 km =9.8 mi, 
273°
• Hem, FR
		15.1 km =9.4 mi, 
289°
• Lys-lez-Lannoy, FR
		13.9 km =8.6 mi, 
298°
• Leers, FR
		13.2 km =8.2 mi, 
309°
• Estaimpuis
		13.8 km =8.6 mi, 
321°
• Antoing
		6.1 km =3.8 mi, 
136°
• Celles
		12.6 km =7.8 mi, 
22°
• Pecq
		9.5 km =5.9 mi, 
337°
Sources (retrieved 2019-11-25):
» NASA, Earths city lights 1995
» NASA city lights 2003
» Earth at Night: Flat Maps 2012, 2016