condition mean min max 0 h after light 1.698615 1.41404 1.98319 4 h after light 1.403496 0.576322 2.23067 8 h after light 2.122725 1.72729 2.51816 4 h after dark 3.47906 3.33305 3.62507 8 h after dark 2.38043 1.67119 3.08967 12 h after dark 2.10284 1.38139 2.82429