howmuchsun

Vitamin D from sunlight in Libya

How long you need in the sun to make vitamin D, and when the sun is too low to make any at all, for 3 cities in Libya.

CityLatitudeElevationVitamin D winter
Tripoli 32.89°N 15 m 10 Dec – 6 Jan (28 days)
Benghazi 32.11°N 3 m none
Misratah 32.38°N 11 m 1 Jan – 1 Jan (11 days)

How these dates are calculated