condition	mean	min	max
4 h after light	21.010108	18.587428	23.432788
8 h after light	15.154261000000002	13.615643	16.692879
12 h after light	17.962627	17.890049	18.035205
4 h after dark	12.452845	12.144779	12.760911
8 h after dark	16.022466	11.805043	20.239889
12 h after dark	19.587237	19.587237	19.587237