condition	mean	min	max
4 h after light	6.494983333333334	6.3034300000000005	6.708889999999999
8 h after light	6.56011	6.25355	6.8468100000000005
12 h after light	6.30919	5.95894	6.52759
4 h after dark	6.529486666666667	6.4427900000000005	6.67773
8 h after dark	6.138083333333333	6.02989	6.33742
12 h after dark	6.21523	6.0408599999999995	6.30666