node_modules/three/src/helpers/DirectionalLightHelper.d.ts

import { DirectionalLight } from './../lights/DirectionalLight';
import { Color } from './../math/Color';
import { Line } from './../objects/Line';
import { Matrix4 } from './../math/Matrix4';
import { Object3D } from './../core/Object3D';

export class DirectionalLightHelper extends Object3D {
  constructor(
    light: DirectionalLight,
    size?: number,
    color?: Color | string | number
  );

  light: DirectionalLight;
  lightPlane: Line;
  targetPlane: Line;
  color: Color | string | number | undefined;
  matrix: Matrix4;
  matrixAutoUpdate: boolean;

  dispose(): void;
  update(): void;
}