condition	mean	min	max
4 h after light	7.467263333333333	7.365139999999999	7.66322
8 h after light	7.40663	7.25927	7.64768
12 h after light	7.34651	6.92415	7.7067
4 h after dark	7.49836	7.261019999999999	7.831589999999999
8 h after dark	7.373036666666666	7.2014	7.640619999999999
12 h after dark	7.055973333333333	6.37252	7.51395