condition	mean	min	max
4 h after light	6.5097499999999995	6.5009	6.52658
8 h after light	6.3245933333333335	6.26734	6.3977
12 h after light	6.32535	6.15641	6.46088
4 h after dark	6.60525	6.47415	6.80832
8 h after dark	6.545286666666667	6.53855	6.55656
12 h after dark	6.710976666666666	6.52687	6.99412