condition mean min max 2 h after light 1.5765383333333334 1.01787 2.10754 6 h after light 1.5453785 0.674992 2.55359 10 h after light 1.3988345 0.60988 2.22649 14 h after light 1.7648983333333335 1.23017 2.58522 18 h after light 1.568141 0.690416 2.15821 2 h after dark 2.7307033333333335 1.56257 4.48564