condition	mean	min	max
4 h after light	6.229856666666667	6.19535	6.2819
8 h after light	6.309506666666667	6.19196	6.48106
12 h after light	6.25526	6.067740000000001	6.40559
4 h after dark	6.120253333333333	6.0035300000000005	6.18764
8 h after dark	6.15613	6.05725	6.20906
12 h after dark	6.25635	6.12315	6.33937