condition	mean	min	max
4 h after light	6.897523333333333	6.82872	6.99898
8 h after light	6.795153333333333	6.72509	6.871239999999999
12 h after light	6.823849999999999	6.78482	6.863589999999999
4 h after dark	6.785629999999999	6.62	7.091189999999999
8 h after dark	6.6926733333333335	6.5479400000000005	6.824110000000001
12 h after dark	6.884476666666667	6.69263	7.06571