condition mean min max 3 h after light 0.0 0.0 0.0 6 h after light 0.0 0.0 0.0 9 h after light 0.0 0.0 0.0 12 h after light 0.0 0.0 0.0 3 h after dark 0.0 0.0 0.0 6 h after dark 0.01574496666666667 0.0 0.0472349 9 h after dark 0.0320367 0.0 0.0612837 12 h after dark 0.0 0.0 0.0