condition	mean	min	max
4 h after light	18.694302999999998	16.153734	21.234872
8 h after light	19.802183499999998	17.956544	21.647823
12 h after light	18.638023	17.956544	19.319502
4 h after dark	17.239821499999998	16.523099	17.956544
8 h after dark	17.1887125	15.283315	19.09411
12 h after dark	20.784866	20.784866	20.784866