condition	mean	min	max
4 h after light	7.947616666666667	7.8688899999999995	8.07968
8 h after light	7.61684	7.34317	8.0393
12 h after light	7.668313333333333	7.385269999999999	8.01577
4 h after dark	8.100903333333333	8.00574	8.26186
8 h after dark	7.96012	7.7957600000000005	8.181989999999999
12 h after dark	7.785576666666667	7.6699399999999995	8.00282