GisEyeLightSpotMaterialProperty

Example:

let lon = 104;
  let lat = 30;
  viewer.entities.add({
    polygon: {
      hierarchy: Cesium.Cartesian3.fromDegreesArrayHeights([
        lon - 0.2 +1, lat - 0.1, 0,
        lon + 0.2+1, lat - 0.1, 0,
        lon + 0.2+1, lat - 0.5, 0,
        lon - 0.2+1, lat - 0.5, 0,
      ]),
      material: new GisEye.GisEyeLightSpotMaterialProperty({
        color: new Cesium.Color(40.0/255.0, 80.0/255.0,138.0/255.0, 1.0),
        rate: 1,
        alpha:1,
        isTranslucent:true
      })
    }
  });