condition mean min max 4 h after light 6.718985 6.66158 6.77639 8 h after light 5.098935 4.57156 5.62631 12 h after light 4.557875 4.12466 4.99109 4 h after dark 6.3610766666666665 5.9707 6.89926 8 h after dark 7.60406 6.53869 8.58114 12 h after dark 7.881296666666667 6.59956 9.45419