condition	mean	min	max
4 h after light	6.15903	5.895569999999999	6.6326
8 h after light	5.95598	5.5395	6.57632
12 h after light	6.007326666666667	5.69727	6.27139
4 h after dark	5.603343333333333	5.51065	5.67668
8 h after dark	5.470313333333333	5.13676	5.68084
12 h after dark	5.48136	5.19842	5.81135