condition mean min max 4 h after light 9.059245 8.00599 10.1125 8 h after light 8.672075 7.9299 9.41425 12 h after light 15.576250000000002 14.7827 16.3698 4 h after dark 21.169 19.802 22.7341 8 h after dark 23.2758 22.8502 23.9848 12 h after dark 13.811666666666666 11.486 16.8298