condition mean min max 4 h after light 3.624695 3.10652 4.14287 8 h after light 1.873615 1.80109 1.94614 12 h after light 4.173715 3.09965 5.24778 4 h after dark 11.86828 8.80896 14.9276 8 h after dark 7.78861 7.22911 8.34811 12 h after dark 5.76752 5.19383 6.34121