condition	mean	min	max
4 h after light	8.80059	8.590160000000001	8.92768
8 h after light	8.868636666666667	8.73069	9.04038
12 h after light	9.04474	8.79808	9.184619999999999
4 h after dark	8.683793333333334	8.47786	8.797460000000001
8 h after dark	8.50996	8.35839	8.69184
12 h after dark	8.480789999999999	8.44914	8.52714