condition	mean	min	max
4 h after light	18.0439845	17.531556	18.556413
8 h after light	17.8772225	16.948565	18.80588
12 h after light	18.2226725	15.699425	20.74592
4 h after dark	14.288957	13.318303	15.259611
8 h after dark	17.131687	12.560359	21.703015
12 h after dark	29.07225	29.07225	29.07225