condition	mean	min	max
4 h after light	17.09355	15.2564	18.9307
8 h after light	15.70145	14.9892	16.4137
12 h after light	14.0825	12.2164	15.9486
4 h after dark	16.446266666666666	15.8657	17.0875
8 h after dark	20.8635	19.9042	21.5872
12 h after dark	19.167	18.3797	19.823