| # | City | Bortle (est.) | Brightness | 2 classes darker |
|---|---|---|---|---|
| 1 | Nairobi | 8–9 | 255 | ~25 km NNW |
| 2 | Mombasa | 7–8 | 255 | ~25 km SE |
| 3 | Ruiru | 7–8 | 203 | ~25 km N |
| 4 | Kikuyu | 7–8 | 184 | ~25 km N |
| 5 | Nakuru | 7–8 | 246 | ~25 km SW |
| 6 | Thika | 7–8 | 214 | ~25 km NNW |
| 7 | Kisumu | 7–8 | 253 | ~25 km SW |
| 8 | Eldoret | 6–7 | 225 | ~25 km ESE |
| 9 | Kakamega | 6–7 | 188 | ~25 km E |
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.