condition	mean	min	max
0 h after light	20.6473	20.6289	20.6657
4 h after light	6.133725	6.08972	6.17773
8 h after light	9.06591	7.53422	10.5976
4 h after dark	8.25216	7.88899	8.61533
8 h after dark	7.48191	6.98895	7.97487
12 h after dark	12.222595	8.94619	15.499