condition	mean	min	max
4 h after light	7.0919455	6.882461	7.30143
8 h after light	7.7562655	7.118611	8.39392
12 h after light	6.9312725	6.70915	7.153395
4 h after dark	7.173875	7.04632	7.30143
8 h after dark	7.7632885	7.741521	7.785056
12 h after dark	6.903523	6.903523	6.903523