condition mean min max 4 h after light 2837.5 2837.5 2837.5 8 h after light 2698.85 2268.5 3129.2 12 h after light 2341.9 2325.9 2357.9 4 h after dark 2252.3 2235.0 2269.6 8 h after dark 1998.9 1864.7 2133.1 12 h after dark 2196.45 1834.7 2558.2