condition	mean	min	max
4 h after light	16.4802715	14.071358	18.889185
8 h after light	17.0631835	14.838304	19.288063
12 h after light	15.971359	15.915543	16.027175
4 h after dark	16.336536	14.515109	18.157963
8 h after dark	16.901694499999998	14.675441	19.127948
12 h after dark	17.852585	17.852585	17.852585