condition	mean	min	max
0 h after light	6.504225	5.78726	7.22119
4 h after light	12.7593	11.3915	14.1271
8 h after light	18.3859	17.0537	19.7181
4 h after dark	19.8983	19.2906	20.506
8 h after dark	12.72165	10.5257	14.9176
12 h after dark	8.669195	5.76919	11.5692