condition mean min max 0 h after light 3.722495 3.39339 4.0516 4 h after light 7.173405000000001 6.25496 8.09185 8 h after light 7.32802 6.10406 8.55198 4 h after dark 8.636325 8.34114 8.93151 8 h after dark 7.269135 6.58175 7.95652 12 h after dark 3.663545 2.77027 4.55682