condition	mean	min	max
0 h after light	8.621275	8.04891	9.19364
4 h after light	12.6733	12.1633	13.1833
8 h after light	16.05025	15.331	16.7695
4 h after dark	21.31625	19.8778	22.7547
8 h after dark	15.58215	14.6432	16.5211
12 h after dark	10.8386	10.0664	11.6108