condition	mean	min	max
4 h after light	7.57599	7.499639999999999	7.6856
8 h after light	7.19236	7.033110000000001	7.2722
12 h after light	7.208843333333333	6.968310000000001	7.41805
4 h after dark	7.940846666666667	7.678310000000001	8.076310000000001
8 h after dark	8.372706666666666	8.158489999999999	8.7104
12 h after dark	8.763533333333333	8.6404	8.93805