condition mean min max 4 h after light 15.631350000000001 15.0497 16.213 8 h after light 42.387100000000004 39.6593 45.1149 12 h after light 36.09725 32.1237 40.0708 4 h after dark 18.273400000000002 16.3631 20.1837 8 h after dark 23.931800000000003 23.2955 24.5681 12 h after dark 16.2024 14.0573 18.3475