Randomly flicker a light intensity

LightFlicker.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

[RequireComponent(typeof(Light))]
public class Flicker : MonoBehaviour
{
    Light _light;

    private float _intensity;

    void Start()
    {
        _light = GetComponent<Light>();  
        _intensity = _light.intensity;
    }

    // Update is called once per frame
    void Update()
    {
        var t = Mathf.PerlinNoise(Time.time * 2.0f, Time.time * 4.0f);
        _light.intensity = t > 0.1f ? _intensity : 0;
    }
}