condition	mean	min	max
4 h after light	16.83285	15.0634	18.6023
8 h after light	18.00725	17.4765	18.538
12 h after light	19.86605	18.1412	21.5909
4 h after dark	23.03595	22.0269	24.045
8 h after dark	19.63835	18.8355	20.4412
12 h after dark	18.1062	18.0601	18.1523