condition	mean	min	max
4 h after light	6.756363333333333	6.720280000000001	6.799869999999999
8 h after light	6.792636666666667	6.476319999999999	7.07556
12 h after light	6.60728	6.35616	6.7984800000000005
4 h after dark	6.76645	6.51255	7.00922
8 h after dark	6.673120000000001	6.36534	6.900010000000001
12 h after dark	6.75866	6.5212900000000005	6.9903