condition mean min max 4 h after light 14.7241425 14.065495 15.38279 8 h after light 13.2014055 11.828802 14.574009 12 h after light 16.2022915 15.798866 16.605717 4 h after dark 14.9045525 13.858044 15.951061 8 h after dark 17.4086625 13.679553 21.137772 12 h after dark 15.751404 15.751404 15.751404