condition	mean	min	max
4 h after light	29.299750000000003	28.1871	30.4124
8 h after light	9.43858	9.08585	9.79131
12 h after light	6.145825	5.75122	6.54043
4 h after dark	8.891105	8.30798	9.47423
8 h after dark	12.211749999999999	11.7091	12.7144
12 h after dark	18.00215	17.5293	18.475