condition	mean	min	max
4 h after light	6.41522	6.25523	6.55106
8 h after light	6.540796666666666	6.36851	6.718389999999999
12 h after light	6.81123	6.595289999999999	7.0785800000000005
4 h after dark	6.69917	6.43935	7.000319999999999
8 h after dark	6.5775733333333335	6.33105	6.98712
12 h after dark	6.762653333333334	6.594360000000001	6.86315