condition	mean	min	max
4 h after light	18.2432515	17.631005	18.855498
8 h after light	18.516979	15.273495	21.760463
12 h after light	18.5764455	17.687869	19.465022
4 h after dark	18.469179	16.963449	19.974909
8 h after dark	18.5303185	14.715543	22.345094
12 h after dark	21.623897	21.623897	21.623897