condition	mean	min	max
4 h after light	6.881963333333333	6.7819199999999995	7.0195
8 h after light	7.066676666666667	7.00205	7.126060000000001
12 h after light	7.074276666666667	6.89973	7.26377
4 h after dark	6.877330000000001	6.770860000000001	7.0065100000000005
8 h after dark	6.64831	6.5811	6.721480000000001
12 h after dark	6.68808	6.56159	6.8151