condition mean min max 0 h after light 21.52825 20.9775 22.079 4 h after light 13.3529 13.1776 13.5282 8 h after light 17.28665 16.4631 18.1102 4 h after dark 25.34905 24.1667 26.5314 8 h after dark 22.7164 22.6804 22.7524 12 h after dark 17.8629 15.2184 20.5074