condition	mean	min	max
4 h after light	8.1001645	8.035789	8.16454
8 h after light	8.9910545	8.207545	9.774564
12 h after light	8.7599075	8.493151	9.026664
4 h after dark	8.489553	8.342806	8.6363
8 h after dark	8.918716	8.841437	8.995995
12 h after dark	8.946096	8.946096	8.946096