ParticleSystem.lights

public ParticleSystem.LightsModule lights ;

Description

Script interface for the Particle System Lights module.

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour {

    public Light lightPrefab;

    void Start() {
        ParticleSystem ps = GetComponent<ParticleSystem>();
        var lights = ps.lights;
        lights.enabled = true;
        lights.ratio = 0.5f;
        lights.light = lightPrefab;
    }
}