_createLights() {

		for ( let i = 0; i < this.cascades; i ++ ) {

			const light = new DirectionalLight( 0xffffff, this.lightIntensity );
			light.castShadow = true;
			light.shadow.mapSize.width = this.shadowMapSize;
			light.shadow.mapSize.height = this.shadowMapSize;

			light.shadow.camera.near = this.lightNear;
			light.shadow.camera.far = this.lightFar;
			light.shadow.bias = this.shadowBias;

			this.parent.add( light );
			this.parent.add( light.target );
			this.lights.push( light );

		}

	}
Creates the directional lights of this CSM instance.

@private