condition	mean	min	max
4 h after light	18.491300000000003	18.2662	18.7164
8 h after light	19.032	18.1687	19.8953
12 h after light	15.36295	15.2081	15.5178
4 h after dark	15.212466666666666	13.0733	17.6584
8 h after dark	33.3823	31.0941	35.7727
12 h after dark	24.3326	20.9219	26.4607