// Expose a reference to a flare in the inspector
var newFlare : Flare;

// Assign the flare
light.flare = newFlare;

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
public Flare newFlare;
void Awake() {
light.flare = newFlare;
}
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

public newFlare as Flare

def Awake():
light.flare = newFlare