condition	mean	min	max
4 h after light	7.59781	7.28003	7.8441399999999994
8 h after light	6.7493	6.44335	7.06973
12 h after light	7.48225	7.08677	7.803789999999999
4 h after dark	7.741473333333333	7.5279300000000005	7.97365
8 h after dark	7.961346666666667	7.668480000000001	8.22182
12 h after dark	8.216496666666668	7.93146	8.3938