condition	mean	min	max
4 h after light	17.26868	14.620424	19.916936
8 h after light	17.4556945	17.319562	17.591827
12 h after light	19.6131155	18.9984	20.227831
4 h after dark	13.872469500000001	13.22983	14.515109
8 h after dark	13.446873	12.917577	13.976169
12 h after dark	12.685265	12.685265	12.685265