Change Directional Light "Intensity Multiplier"

Hi there! I have a Directional Light in my scene. It's possible change de "Intensity Multiplier" through script?
I've look inside th forum and I found this code below but is not working:

RenderSettings.ambientIntensity = 16;

But I can change another settings like "Intentensity" using:
DirectionalLight.GetComponent<Light>().intensity = 10;

I´m using HDRP and Unity 2019.4.1f1. Someone can help? Tks

 

Ok I found the solution.
This code can change de "Intensity Multiplier" for a directional light in HDRP.
I attach this script to my Directional Light gameobject.

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Rendering.HighDefinition;

public class ChangeIntensityMultiplier : MonoBehaviour
{
void Start()
{
var light = gameObject.GetComponent<HDAdditionalLightData>();
light.lightDimmer = 5; //set here desired value
}
}