condition	mean	min	max
4 h after light	8.64606	8.4976	8.76408
8 h after light	8.89465	8.75489	9.032910000000001
12 h after light	8.951533333333334	8.86471	9.0192
4 h after dark	8.8054	8.638710000000001	8.95593
8 h after dark	8.765093333333333	8.56472	8.92314
12 h after dark	8.727536666666666	8.625589999999999	8.87013