condition	mean	min	max
4 h after light	6.43588	6.36982	6.5664
8 h after light	6.307243333333333	5.98905	6.5043
12 h after light	6.139943333333333	6.09744	6.22438
4 h after dark	6.3286299999999995	6.09419	6.6493899999999995
8 h after dark	6.28742	5.80521	6.620589999999999
12 h after dark	6.37165	6.16845	6.61258