condition mean min max 4 h after light 1973.2 1973.2 1973.2 8 h after light 2088.8 2000.9 2176.7 12 h after light 2380.0 1894.9 2865.1 4 h after dark 2297.9 1447.0 3148.8 8 h after dark 1897.4 1665.8 2129.0 12 h after dark 2205.2 1963.7 2446.7