condition	mean	min	max
4 h after light	7.752726666666667	7.388330000000001	7.964410000000001
8 h after light	8.15829	7.927010000000001	8.28854
12 h after light	7.92279	7.40009	8.316510000000001
4 h after dark	8.359976666666666	8.279869999999999	8.4071
8 h after dark	8.465346666666667	8.09671	8.732999999999999
12 h after dark	8.42609	7.94327	8.75783