condition	mean	min	max
4 h after light	6.74708	6.60571	6.84577
8 h after light	6.822206666666666	6.67679	7.0613399999999995
12 h after light	6.621616666666667	6.52419	6.70205
4 h after dark	6.693116666666667	6.595089999999999	6.754010000000001
8 h after dark	6.69441	6.641030000000001	6.72985
12 h after dark	6.892196666666667	6.86579	6.91184