condition	mean	min	max
4 h after light	6.22823	6.162719999999999	6.27418
8 h after light	6.47373	6.43646	6.50851
12 h after light	6.55192	6.44888	6.68115
4 h after dark	6.65738	6.48808	6.79978
8 h after dark	6.5649033333333335	6.5155	6.619510000000001
12 h after dark	6.7522166666666665	6.44591	7.17317