condition	mean	min	max
4 h after light	6.958403333333333	6.796860000000001	7.072189999999999
8 h after light	7.030483333333333	6.9765	7.107419999999999
12 h after light	6.765053333333333	6.639010000000001	6.918830000000001
4 h after dark	7.0568100000000005	7.0291	7.07265
8 h after dark	7.064220000000001	6.91184	7.182860000000001
12 h after dark	7.31869	7.18982	7.55195