Light pollution in Sierra Leone

3 cities · estimated Bortle class at each city centre

1 of 3 cities read Bortle 6–7 · 2 of 3 cities read Bortle 5–6. The darkest city centre on the list is Bo (Bortle 5–6).

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Cities, brightest first

#	City	Bortle (est.)	Brightness	2 classes darker
1	Freetown	6–7	168	~25 km SW
2	Kenema	5–6	88	~25 km SW
3	Bo	5–6	87	~50 km ESE

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.