condition	mean	min	max
4 h after light	7.351236666666666	7.1058699999999995	7.5335399999999995
8 h after light	7.032226666666666	6.9762	7.061089999999999
12 h after light	6.659680000000001	6.41678	6.97545
4 h after dark	7.1997833333333325	6.986269999999999	7.39199
8 h after dark	7.59971	7.09231	7.863169999999999
12 h after dark	8.555173333333334	8.31175	8.73836