{
      "id": "points",
      "type": "circle",
      "source": "power.points",
      "paint": {
        "circle-color": "red",
        "circle-radius": [
          "interpolate", ["linear"], ["zoom"],
          10, 3,
          18, 10
        ],
        "circle-stroke-width": [
          "interpolate", ["linear"], ["zoom"],
          8, 1,
          13, 3
        ],
        "circle-stroke-color": "white"
      }
    }