condition	mean	min	max
4 h after light	17.6914	16.648	18.7348
8 h after light	15.59815	15.4991	15.6972
12 h after light	16.32045	16.2291	16.4118
4 h after dark	18.423166666666667	16.8015	19.2765
8 h after dark	19.237199999999998	18.2915	20.0642
12 h after dark	14.368066666666667	11.8693	17.7106