condition mean min max 0 h after light 8.409165 8.24009 8.57824 2 h after light 4.56612 4.35415 4.77809 4 h after light 4.48938 3.55041 5.42835 8 h after light 4.66615 4.30167 5.03063 12 h after light 11.577865 9.82203 13.3337 2 h after dark 11.9585 11.6529 12.2641 4 h after dark 12.68245 12.3584 13.0065 8 h after dark 14.30485 11.8144 16.7953 12 h after dark 11.1763 10.8257 11.5269