condition mean min max 4 h after light 1617.3 1617.3 1617.3 8 h after light 1579.75 1442.7 1716.8 12 h after light 1785.45 1459.5 2111.4 4 h after dark 2351.5 1943.4 2759.6 8 h after dark 2367.15 2344.9 2389.4 12 h after dark 2095.35 2058.6 2132.1