The light is a spot light.

	// Make the light a spot light
	light.type = LightType.Spot;

using UnityEngine;
using System.Collections;

public class Example : MonoBehaviour {
    void Example() {
        light.type = LightType.Spot;
    }
}

import UnityEngine
import System.Collections

public class Example(MonoBehaviour):

	def Example() as void:
		light.type = LightType.Spot