condition	mean	min	max
4 h after light	7.076336666666666	7.0018	7.130319999999999
8 h after light	7.44887	6.93933	7.79745
12 h after light	7.538073333333333	7.16409	7.765280000000001
4 h after dark	7.16359	6.689030000000001	7.45257
8 h after dark	7.007016666666667	6.882910000000001	7.11382
12 h after dark	6.6043433333333335	6.49913	6.776160000000001