condition	mean	min	max
4 h after light	6.45336	6.308730000000001	6.71997
8 h after light	6.39801	6.30865	6.44379
12 h after light	6.383103333333334	6.31618	6.47147
4 h after dark	6.512623333333333	6.44848	6.59392
8 h after dark	6.522309999999999	6.41322	6.712789999999999
12 h after dark	6.669626666666667	6.41394	7.150869999999999