condition	mean	min	max
4 h after light	20.0046305	19.670303	20.338958
8 h after light	19.8404035	18.845399	20.835408
12 h after light	18.4737185	18.102038	18.845399
4 h after dark	19.670303	19.670303	19.670303
8 h after dark	20.9392475	19.670303	22.208192
12 h after dark	20.584134	20.584134	20.584134