condition	mean	min	max
4 h after light	9.01	8.51813	9.50187
8 h after light	8.451385	8.2896	8.61317
12 h after light	9.494865	8.61173	10.378
4 h after dark	9.127366666666667	7.88687	9.78548
8 h after dark	18.889	18.131	20.2191
12 h after dark	18.443466666666666	17.3636	19.2314