condition	mean	min	max
4 h after light	8.659873333333334	8.4675	8.89611
8 h after light	8.595683333333334	8.444230000000001	8.686110000000001
12 h after light	8.36871	8.24818	8.5429
4 h after dark	8.249226666666667	8.0608	8.37969
8 h after dark	8.15631	8.13133	8.18005
12 h after dark	8.272746666666666	8.12186	8.461889999999999