condition	mean	min	max
4 h after light	18.205771	14.275356	22.136186
8 h after light	18.930773	15.024664	22.836882
12 h after light	15.614808	15.234825	15.994791
4 h after dark	13.403946000000001	11.573067	15.234825
8 h after dark	11.310568	9.883575	12.737561
12 h after dark	23.447844	23.447844	23.447844