condition	mean	min	max
4 h after light	18.947070500000002	17.191832	20.702309
8 h after light	19.834528499999998	18.770847	20.89821
12 h after light	17.317765	16.708427	17.927103
4 h after dark	19.590658	17.210429	21.970887
8 h after dark	19.175077	19.025282	19.324872
12 h after dark	19.324872	19.324872	19.324872