condition	mean	min	max
4 h after light	15.386299999999999	14.2858	16.4868
8 h after light	15.24515	15.0287	15.4616
12 h after light	14.684650000000001	14.483	14.8863
4 h after dark	17.0434	16.3683	17.7185
8 h after dark	17.8037	17.159	18.4484
12 h after dark	18.24825	18.052	18.4445