condition mean min max 4 h after light 1.5364833333333334 1.16385 1.96373 8 h after light 1.109372 0.495256 1.47784 12 h after light 1.245091 0.829923 1.61617 4 h after dark 2.42882 2.07786 2.7043 8 h after dark 2.31781 2.0196 2.80659 12 h after dark 1.6439533333333334 1.07724 2.14165