condition	mean	min	max
4 h after light	7.98488	7.91638	8.09345
8 h after light	8.506536666666667	8.16308	8.70076
12 h after light	8.264443333333332	8.04613	8.39643
4 h after dark	8.00242	7.50921	8.352089999999999
8 h after dark	7.832953333333333	7.5926100000000005	8.08484
12 h after dark	7.49021	7.18867	7.70253