condition mean min max 4 h after light 3.84698 3.27642 4.41754 8 h after light 1.908655 1.73531 2.082 12 h after light 5.87945 5.79818 5.96072 4 h after dark 10.130894999999999 8.18239 12.0794 8 h after dark 14.922 14.9138 14.9302 12 h after dark 7.01586 5.40732 8.6244