condition	mean	min	max
4 h after light	6.9545	6.7241100000000005	7.102060000000001
8 h after light	7.108913333333333	6.83073	7.260339999999999
12 h after light	7.23909	7.084289999999999	7.33575
4 h after dark	7.041060000000001	6.9447600000000005	7.191560000000001
8 h after dark	6.7316633333333336	6.586310000000001	6.869489999999999
12 h after dark	6.951676666666667	6.92668	6.9861699999999995