Nikkō night lights from space
Night Light of Nikkō (Tochigi) from space (Japan) Src. Average luminocity for 10x10km area is 8.1888% and for 50x50km: 5.5764%.
Analysis of Nikkō night lights 2016
Square area 10x10 km:
100 
0.35%
90-99 1.05%
80-89 0.7%
70-79 1.4%
60-69 0%
50-59 1.05%
40-49 2.45%
30-39 0%
20-29 2.97%
10-19 1.05%
0-9 88.99%
0.35%90-99
1.05%80-89
0.7%70-79
1.4%60-69
0%50-59
1.05%40-49
2.45%30-39
0%20-29
2.97%10-19
1.05%0-9
88.99%Square area 50x50 km:
100 0.53%
90-99 1.11%
80-89 0.55%
70-79 0.78%
60-69 0.76%
50-59 0.73%
40-49 1.18%
30-39 0.75%
20-29 1.49%
10-19 2.47%
0-9 89.65%
0.53%90-99
1.11%80-89
0.55%70-79
0.78%60-69
0.76%50-59
0.73%40-49
1.18%30-39
0.75%20-29
1.49%10-19
2.47%0-9
89.65%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
37° 18' 40.7" North, 138° 54' 48.8" East
36° 45' 0" North, 139° 37' 0" East
36° 11' 4.4" North, 140° 19' 11.3" East
Some cities around Nikkō sort by population:
• Utsunomiya
31.3 km =19.4 mi, 
130°
• Kanuma
24.6 km =15.3 mi, 
154°
• Tochigi
42.1 km =26.2 mi, 
165°
• Imaichi
7 km =4.3 mi, 
121°
• Ōtawara
39.3 km =24.4 mi, 
70°
• Mibu
40.5 km =25.2 mi, 
156°
• Yaita
28.7 km =17.8 mi, 
78°
• Ujiie
32.1 km =19.9 mi, 
103°
1855395 (p: 16,041)
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016