condition	mean	min	max
4 h after light	7.5599875	7.252192	7.867783
8 h after light	7.597943	7.514383	7.681503
12 h after light	7.7083569999999995	7.552032	7.864682
4 h after dark	7.7726015	7.080996	8.464207
8 h after dark	7.746171	7.671887	7.820455
12 h after dark	7.820455	7.820455	7.820455