condition	mean	min	max
4 h after light	6.771293333333333	6.641960000000001	6.87482
8 h after light	6.87943	6.7864	7.036289999999999
12 h after light	6.77956	6.69637	6.90912
4 h after dark	6.838993333333334	6.741860000000001	7.01733
8 h after dark	6.616006666666666	6.52051	6.79783
12 h after dark	6.511943333333333	6.39723	6.693289999999999