condition	mean	min	max
4 h after light	6.373013333333334	6.24749	6.522419999999999
8 h after light	6.394406666666667	6.25116	6.58978
12 h after light	6.399493333333333	6.31365	6.55668
4 h after dark	6.56027	6.39405	6.72785
8 h after dark	6.89731	6.75105	7.048889999999999
12 h after dark	6.9988866666666665	6.76731	7.28633