condition mean min max 4 h after light 1.558345 1.0706 2.04609 8 h after light 2.091495 1.8579 2.32509 12 h after light 15.70785 10.0692 21.3465 4 h after dark 16.5919 15.8153 17.9267 8 h after dark 12.715133333333334 5.8784 16.2016 12 h after dark 3.474893333333333 2.77548 4.46