condition	mean	min	max
4 h after light	19.721508	19.348673	20.094343
8 h after light	16.5882045	15.666649	17.50976
12 h after light	16.019997500000002	15.648232	16.391763
4 h after dark	17.973929499999997	16.243975	19.703884
8 h after dark	17.248874	16.189114	18.308634
12 h after dark	15.037385	15.037385	15.037385