condition	mean	min	max
4 h after light	6.4482099999999996	6.32534	6.606489999999999
8 h after light	6.035616666666667	5.98749	6.0782
12 h after light	6.152396666666667	5.8676	6.33211
4 h after dark	6.128943333333333	6.05207	6.2729
8 h after dark	6.39293	6.21225	6.54441
12 h after dark	6.484453333333334	6.3683	6.59433