condition	mean	min	max
4 h after light	6.5814466666666664	6.4770900000000005	6.67663
8 h after light	6.833190000000001	6.57875	7.070310000000001
12 h after light	7.0310466666666676	6.7660800000000005	7.484610000000001
4 h after dark	7.249293333333334	7.0339100000000006	7.645410000000001
8 h after dark	7.2584333333333335	6.9728699999999995	7.70955
12 h after dark	7.160946666666667	6.42692	7.543069999999999