condition	mean	min	max
4 h after light	8.618406666666667	8.30771	8.78757
8 h after light	8.462	8.40757	8.553560000000001
12 h after light	8.52747	8.346789999999999	8.65428
4 h after dark	9.109153333333333	8.917869999999999	9.20888
8 h after dark	9.23522	9.07591	9.33057
12 h after dark	9.46543	9.189789999999999	9.64788