Version: 2017.3
public float spotAngle ;

Description

The angle of the light's spotlight cone in degrees.

This is used primarily for Spot lights and has no effect for Point lights See Also: Light component.

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour { public float interval = 0.3F; public float minAngle = 10; public float maxAngle = 90; public float timeLeft; public Light lt; void Start() { lt = GetComponent<Light>(); lt.type = LightType.Spot; timeLeft = interval; } void Update() { timeLeft -= Time.deltaTime; if (timeLeft < 0.0F) { timeLeft = interval; lt.spotAngle = Random.Range(minAngle, maxAngle); } } }