condition mean min max 4 h after light 2.5506349999999998 2.45427 2.647 8 h after light 1.83792 1.74218 1.93366 12 h after light 2.233595 2.0181 2.44909 4 h after dark 3.04369 2.92735 3.16003 8 h after dark 2.415385 2.40734 2.42343 12 h after dark 3.55858 3.40691 3.71025