condition	mean	min	max
4 h after light	18.059587	17.749241	18.369933
8 h after light	19.3916105	18.614806	20.168415
12 h after light	15.626881000000001	14.124204	17.129558
4 h after dark	15.866081	15.314249	16.417913
8 h after dark	15.736457999999999	14.619993	16.852923
12 h after dark	17.165725	17.165725	17.165725