condition	mean	min	max
4 h after light	6.617486666666666	6.57066	6.70016
8 h after light	6.664936666666667	6.58171	6.81548
12 h after light	6.5172799999999995	6.383830000000001	6.61809
4 h after dark	6.65808	6.38435	6.865639999999999
8 h after dark	6.632193333333333	6.5831	6.71841
12 h after dark	6.5754600000000005	6.4425099999999995	6.686210000000001