condition	mean	min	max
4 h after light	8.550296666666666	8.43533	8.63471
8 h after light	8.975173333333334	8.785160000000001	9.10475
12 h after light	8.9792	8.922080000000001	9.055480000000001
4 h after dark	9.14039	8.93731	9.28508
8 h after dark	8.910966666666667	8.75301	9.04977
12 h after dark	8.83681	8.69046	8.911010000000001