condition	mean	min	max
4 h after light	17.403791	15.904515	18.903067
8 h after light	14.3918785	14.082116	14.701641
12 h after light	19.2502145	16.642996	21.857433
4 h after dark	13.2312385	12.509548	13.952929
8 h after dark	14.343172	11.628979	17.057365
12 h after dark	19.963452	19.963452	19.963452