condition	mean	min	max
0 h after light	8.808815	8.39021	9.22742
4 h after light	2.27798	1.85848	2.69748
8 h after light	3.734485	2.50652	4.96245
4 h after dark	5.96777	5.84492	6.09062
8 h after dark	5.409175	4.8005	6.01785
12 h after dark	5.049635	4.54367	5.5556