Unity - Scripting API: Light.spotAngle

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Description

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

using UnityEngine;public class Example : MonoBehaviour
{
    // Change spot angle randomly between 'minAngle' and 'maxAngle'
    // each 'interval' seconds.
    float interval = 0.3f;
    float minAngle = 10;
    float maxAngle = 90;
    float timeLeft;
    Light lt;

    void Start()
    {
        lt = GetComponent<Light>();
        lt.type = LightType.Spot;
        timeLeft = interval;
    }
    void Update()
    {
        timeLeft -= Time.deltaTime;
        if (timeLeft < 0.0)
        {
            // time to change!
            timeLeft = interval;
            lt.spotAngle = Random.Range(minAngle, maxAngle);
        }
    }
}