condition	mean	min	max
4 h after light	6.581393333333334	6.53268	6.640689999999999
8 h after light	6.268026666666667	6.18498	6.40094
12 h after light	6.507516666666667	6.440919999999999	6.61908
4 h after dark	6.55743	6.36768	6.703760000000001
8 h after dark	6.642493333333333	6.4608300000000005	6.765689999999999
12 h after dark	6.6461	6.36487	6.921989999999999