condition	mean	min	max
4 h after light	6.86463	6.822889999999999	6.91078
8 h after light	6.79357	6.6532	6.97669
12 h after light	6.703713333333333	6.45104	7.02843
4 h after dark	6.84971	6.61522	7.240889999999999
8 h after dark	6.553046666666667	6.35158	6.86988
12 h after dark	6.80467	6.4336199999999995	7.0362