condition	mean	min	max
4 h after light	8.531843333333335	8.34706	8.712110000000001
8 h after light	8.651900000000001	8.566930000000001	8.79996
12 h after light	8.518753333333333	8.43547	8.59418
4 h after dark	8.452636666666667	8.40976	8.52881
8 h after dark	8.315570000000001	8.13696	8.515
12 h after dark	8.401570000000001	8.29232	8.55558