condition mean min max 0 h after light 2.603475 2.25734 2.94961 4 h after light 4.148325 3.09651 5.20014 8 h after light 4.622615 4.19605 5.04918 4 h after dark 7.290295 6.48373 8.09686 8 h after dark 7.4771 6.76626 8.18794 12 h after dark 3.08946 1.96027 4.21865