condition	mean	min	max
4 h after light	5.350465	3.65988	7.04105
8 h after light	5.684045	4.41603	6.95206
12 h after light	8.960165	8.39607	9.52426
4 h after dark	15.702766666666667	13.7491	18.8649
8 h after dark	15.418266666666668	12.813	17.2363
12 h after dark	8.36768	7.54316	9.35586