condition	mean	min	max
4 h after light	6.808703333333334	6.788880000000001	6.836930000000001
8 h after light	6.762976666666666	6.6848	6.82769
12 h after light	6.69067	6.62436	6.771839999999999
4 h after dark	6.78115	6.63933	6.9265300000000005
8 h after dark	6.76972	6.5641	7.001360000000001
12 h after dark	6.897430000000001	6.699510000000001	7.250560000000001