condition	mean	min	max
4 h after light	3.9193100000000003	3.8105	4.0721300000000005
8 h after light	3.87541	3.81224	3.9237300000000004
12 h after light	3.890486666666667	3.87428	3.89964
4 h after dark	3.9354	3.8884800000000004	3.963
8 h after dark	3.9263333333333335	3.8893199999999997	3.9450800000000004
12 h after dark	3.9134333333333333	3.82704	4.04774