condition	mean	min	max
4 h after light	4.92387	4.39992	5.44782
8 h after light	8.350169999999999	8.3144	8.38594
12 h after light	9.099730000000001	8.94266	9.2568
4 h after dark	13.656600000000001	12.455	14.8582
8 h after dark	17.88845	17.2353	18.5416
12 h after dark	12.3035	11.8931	12.7139