condition	mean	min	max
4 h after light	6.9518466666666665	6.87777	7.01536
8 h after light	7.240643333333334	7.18855	7.30607
12 h after light	7.2415199999999995	7.15897	7.33524
4 h after dark	6.99874	6.938	7.08502
8 h after dark	6.77435	6.67846	6.84549
12 h after dark	6.5579600000000005	6.3339	6.7089300000000005