condition mean min max 0 h after light 4.522315 4.44412 4.60051 4 h after light 4.20673 3.72588 4.68758 8 h after light 4.52895 4.18129 4.87661 4 h after dark 5.81879 4.86015 6.77743 8 h after dark 6.580945 6.52731 6.63458 12 h after dark 4.52106 2.46125 6.58087