condition	mean	min	max
4 h after light	8.439055	7.82592	9.05219
8 h after light	6.59897	6.47889	6.71905
12 h after light	6.880275	6.50748	7.25307
4 h after dark	8.11127	7.85279	8.43724
8 h after dark	8.21208	7.63825	8.97118
12 h after dark	7.427276666666667	6.4126	8.34372