condition mean min max 4 h after light 6.835859999999999 6.77809 6.92765 8 h after light 7.2857 7.13922 7.38633 12 h after light 6.475276666666667 6.13794 6.74 4 h after dark 6.666119999999999 6.22745 6.92322 8 h after dark 6.754536666666667 6.6403 6.84388 12 h after dark 6.690526666666666 6.652089999999999 6.7653