condition	mean	min	max
4 h after light	20.37095	18.6847	22.0572
8 h after light	10.31184	9.76868	10.855
12 h after light	8.89263	7.82638	9.95888
4 h after dark	9.22023	8.82179	9.66642
8 h after dark	10.6936	10.3741	11.0215
12 h after dark	18.29586666666667	17.6243	18.6923