condition	mean	min	max
4 h after light	18.145200000000003	15.2332	21.0572
8 h after light	12.3314	11.2941	13.3687
12 h after light	9.712900000000001	9.0311	10.3947
4 h after dark	13.711233333333334	13.3587	13.9504
8 h after dark	13.658766666666667	12.5024	14.593
12 h after dark	18.918833333333332	18.4479	19.2873