condition mean min max 4 h after light 3.6650349999999996 3.05144 4.27863 8 h after light 2.8683199999999998 2.7624 2.97424 12 h after light 2.6716550000000003 2.44763 2.89568 4 h after dark 1.68849 1.64237 1.73461 8 h after dark 2.786165 2.24017 3.33216 12 h after dark 3.517385 3.48019 3.55458