condition	mean	min	max
4 h after light	8.633426666666667	8.4516	8.73974
8 h after light	8.638523333333334	8.475480000000001	8.87478
12 h after light	9.053749999999999	8.90115	9.15961
4 h after dark	8.953153333333333	8.57703	9.3112
8 h after dark	8.97291	8.62774	9.31663
12 h after dark	8.68768	8.29673	8.96067