condition	mean	min	max
4 h after light	19.7326505	17.574837	21.890464
8 h after light	15.783931	14.608186	16.959676
12 h after light	17.689091	16.959676	18.418506
4 h after dark	19.0673765	16.959676	21.175077
8 h after dark	16.6850125	16.448224	16.921801
12 h after dark	16.545625	16.545625	16.545625