condition	mean	min	max
4 h after light	17.5377	16.4973	18.5781
8 h after light	15.4404	14.4914	16.3894
12 h after light	17.067349999999998	16.7777	17.357
4 h after dark	20.473	20.3831	20.5629
8 h after dark	21.3795	20.3724	22.3866
12 h after dark	21.37625	21.3551	21.3974