condition	mean	min	max
4 h after light	6.411883333333334	6.32789	6.51633
8 h after light	6.365946666666667	6.11554	6.54157
12 h after light	6.34612	6.203130000000001	6.6186300000000005
4 h after dark	6.42932	6.24295	6.69394
8 h after dark	6.257890000000001	5.90394	6.50623
12 h after dark	6.328423333333333	6.25289	6.43311