condition mean min max 4 h after light 55.77365 55.4731 56.0742 8 h after light 34.8652 34.5493 35.1811 12 h after light 45.4387 44.518 46.3594 4 h after dark 47.0921 44.3873 49.7969 8 h after dark 54.83655 53.8432 55.8299 12 h after dark 62.48285 61.6902 63.2755