condition	mean	min	max
4 h after light	6.5339	6.42056	6.6360399999999995
8 h after light	6.73008	6.5061800000000005	6.94228
12 h after light	6.605053333333333	6.27203	6.834239999999999
4 h after dark	6.837646666666667	6.4858400000000005	7.20467
8 h after dark	6.506566666666667	6.35576	6.71085
12 h after dark	6.4849266666666665	6.222090000000001	6.6503