| # | City | Bortle (est.) | Brightness | 2 classes darker |
|---|---|---|---|---|
| 1 | Lima | 8–9 | 255 | ~25 km SW |
| 2 | Arequipa | 8–9 | 255 | ~25 km NE |
| 3 | Chiclayo | 7–8 | 255 | ~25 km WSW |
| 4 | Piura | 7–8 | 255 | ~25 km ENE |
| 5 | Trujillo | 7–8 | 255 | ~25 km SSW |
| 6 | Huancayo | 7–8 | 255 | ~25 km ESE |
| 7 | Ica | 7–8 | 255 | ~25 km ENE |
| 8 | Tacna | 7–8 | 251 | ~25 km ENE |
| 9 | Juliaca | 7–8 | 250 | ~25 km ENE |
| 10 | Cusco | 7–8 | 254 | ~25 km SW |
| 11 | Cajamarca | 7–8 | 243 | ~25 km NW |
| 12 | Pucallpa | 7–8 | 255 | ~25 km N |
| 13 | Chimbote | 7–8 | 204 | ~25 km SW |
| 14 | Iquitos | 7–8 | 251 | ~25 km ENE |
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.