Light pollution in Guinea

3 cities · estimated Bortle class at each city centre

1 of 3 cities read Bortle 7–8 · 1 of 3 cities read Bortle 5–6 · 1 of 3 cities read Bortle 4–5. The darkest city centre on the list is Nzérékoré (Bortle 4–5).

Interactive light pollution map → All countries →

Cities, brightest first

#	City	Bortle (est.)	Brightness	2 classes darker
1	Conakry	7–8	233	~25 km W
2	Kankan	5–6	112	not within 90 km
3	Nzérékoré	4–5	42	not within 90 km

Brightness is the NASA VIIRS Black Marble 2016 value at the city centre on a 0–255 scale; 255 is saturated. Cities are ordered by estimated sky brightness, which also counts the light within 30 km.