condition mean min max 4 h after light 0.0746862 0.049533 0.0998394 8 h after light 0.0 0.0 0.0 12 h after light 0.0 0.0 0.0 4 h after dark 0.065698 0.0 0.131396 8 h after dark 0.0755354 0.0428908 0.10818 12 h after dark 0.01793385 0.0 0.0358677