condition	mean	min	max
4 h after light	6.564906666666667	6.4759400000000005	6.716810000000001
8 h after light	6.803403333333334	6.645389999999999	7.002510000000001
12 h after light	6.924363333333333	6.77377	7.11228
4 h after dark	6.52887	6.4360800000000005	6.58327
8 h after dark	6.452233333333333	6.2964	6.64705
12 h after dark	6.548430000000001	6.387230000000001	6.82282