condition	mean	min	max
4 h after light	17.459428000000003	16.891998	18.026858
8 h after light	19.826453	18.381985	21.270921
12 h after light	15.979635	14.965495	16.993775
4 h after dark	17.0178355	14.927959	19.107712
8 h after dark	14.923502	14.004883	15.842121
12 h after dark	17.639298	17.639298	17.639298