condition	mean	min	max
4 h after light	17.412378	14.682823	20.141933
8 h after light	17.965698500000002	16.460669	19.470728
12 h after light	18.527884	17.165725	19.890043
4 h after dark	16.508613	11.524726	21.4925
8 h after dark	16.616255	13.305728	19.926782
12 h after dark	19.498195	19.498195	19.498195