condition	mean	min	max
4 h after light	15.3960315	15.281581	15.510482
8 h after light	14.0563345	12.837536	15.275133
12 h after light	14.5240795	14.185386	14.862773
4 h after dark	15.051845	14.834342	15.269348
8 h after dark	14.209119	13.583896	14.834342
12 h after dark	15.614943	15.614943	15.614943