condition mean min max 4 h after light 1578.3 1578.3 1578.3 8 h after light 1345.5 1291.0 1400.0 12 h after light 1000.85 992.2 1009.5 4 h after dark 1126.8 817.4 1436.2 8 h after dark 1429.9 1123.6 1736.2 12 h after dark 1621.8000000000002 1345.9 1897.7