condition	mean	min	max
0 h after light	18.6979	18.0424	19.3534
4 h after light	14.82105	14.4786	15.1635
8 h after light	15.7105	14.8698	16.5512
4 h after dark	21.60215	21.2397	21.9646
8 h after dark	21.91655	20.9801	22.853
12 h after dark	19.3671	19.2766	19.4576