condition	mean	min	max
4 h after light	19.3115835	17.870059	20.753108
8 h after light	17.184381000000002	16.959676	17.409086
12 h after light	19.2871435	18.556413	20.017874
4 h after dark	20.1303635	19.081096	21.179631
8 h after dark	18.149619	16.99874	19.300498
12 h after dark	19.787807	19.787807	19.787807