condition	mean	min	max
4 h after light	17.78905	15.1541	20.424
8 h after light	21.35295	21.0242	21.6817
12 h after light	14.188849999999999	13.9422	14.4355
4 h after dark	20.903100000000002	20.1596	21.6466
8 h after dark	14.69425	14.5822	14.8063
12 h after dark	14.26055	14.2394	14.2817