condition mean min max 0 h after light 6.184475 5.63404 6.73491 4 h after light 18.94645 17.7302 20.1627 8 h after light 3.935715 3.88727 3.98416 4 h after dark 0.0 0.0 0.0 8 h after dark 0.20543414999999998 0.0689583 0.34191 12 h after dark 6.85459 6.58719 7.12199