condition	mean	min	max
4 h after light	8.61416	8.50039	8.71418
8 h after light	8.572043333333333	8.2615	8.8546
12 h after light	8.839003333333332	8.677430000000001	8.943439999999999
4 h after dark	8.817003333333334	8.68138	8.96594
8 h after dark	8.72743	8.60702	8.8169
12 h after dark	8.46284	8.33153	8.56048