condition	mean	min	max
4 h after light	7.18573	6.9501800000000005	7.450310000000001
8 h after light	7.079066666666667	6.91475	7.274030000000001
12 h after light	7.12497	6.918989999999999	7.404310000000001
4 h after dark	7.100396666666667	6.77825	7.38905
8 h after dark	7.066513333333333	7.00473	7.09779
12 h after dark	6.880310000000001	6.70149	7.00168