condition	mean	min	max
4 h after light	20.728634	20.092126	21.365142
8 h after light	15.6880945	14.49512	16.881069
12 h after light	19.3681835	15.211403	23.524964
4 h after dark	17.1881505	15.12871	19.247591
8 h after dark	16.186582	14.569068	17.804096
12 h after dark	32.135394	32.135394	32.135394