Light.intensity

Description

The Intensity of a light is multiplied with the Light color.

The value can be between 0 and 8. This allows you to create over bright lights.

using UnityEngine;

public class example : MonoBehaviour
{
    Light myLight;

    void Start()
    {
        myLight = GetComponent<Light>();
    }

    void Update()
    {
        myLight.intensity = Mathf.PingPong(Time.time, 8);
    }
}