metaballs/Assets/metaball/Scripts/MetaLight.cs

using UnityEngine;
using System.Collections;

namespace MetaBalls
{
    [RequireComponent(typeof(Light))]
    public class MetaLight : MonoBehaviour
    {
        public MetaBall linkedMetaball;
        public float intensity;

        private float phaseShift;
        private Light lightComponent;

        void Start()
        {
            this.phaseShift = Random.Range(0, Mathf.PI);
            this.lightComponent = this.GetComponent<Light>();
        }

        void Update()
        {
            this.lightComponent.intensity = this.intensity * (this.linkedMetaball.transform.localPosition.magnitude + (1 + Mathf.Sin(this.phaseShift + Time.time / 2)));
        }
    }
}