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 0.0306835 0.0 0.122734 3 h after dark 0.0 0.0 0.0 6 h after dark 0.0219178 0.0 0.0657534 9 h after dark 0.0 0.0 0.0 12 h after dark 0.0 0.0 0.0