condition mean min max 4 h after light 1801.5 1801.5 1801.5 8 h after light 2204.0 2065.7 2342.3 12 h after light 2169.15 1941.5 2396.8 4 h after dark 2006.5 1905.4 2107.6 8 h after dark 2272.2 1829.5 2714.9 12 h after dark 1801.15 1515.8 2086.5