node_modules/three/src/lights/RectAreaLight.d.ts

import { Light } from './Light';
import { Color } from './../math/Color';

export class RectAreaLight extends Light {
  constructor(
    color?: Color | string | number,
    intensity?: number,
    width?: number,
    height?: number
  );

  type: string;
  width: number;
  height: number;
  intensity: number;
}