condition mean min max 4 h after light 23.5624 21.0444 26.0804 8 h after light 26.83645 26.5833 27.0896 12 h after light 28.8689 23.6256 34.1122 4 h after dark 34.0554 29.8004 38.3104 8 h after dark 24.4391 23.1415 25.7367 12 h after dark 31.5346 31.2785 31.7907