condition	mean	min	max
4 h after light	8.254096666666667	8.21767	8.3001
8 h after light	8.090200000000001	8.009	8.23675
12 h after light	8.147843333333332	7.889469999999999	8.34414
4 h after dark	8.223783333333333	8.16245	8.31286
8 h after dark	8.234873333333333	8.14205	8.40127
12 h after dark	8.22025	8.07578	8.3599