condition	mean	min	max
4 h after light	6.642646666666667	6.35994	6.85637
8 h after light	6.66579	6.47844	6.798760000000001
12 h after light	7.443350000000001	7.2950800000000005	7.5842600000000004
4 h after dark	7.307359999999999	6.9803	7.59439
8 h after dark	7.159853333333333	6.968789999999999	7.33742
12 h after dark	6.94075	6.575130000000001	7.2504800000000005