QualitySettings.pixelLightCount
static var pixelLightCount: int;
static int pixelLightCount;
static pixelLightCount as int
Description

The maximum number of pixel lights that should affect any object.

If there are more lights illuminating an object, the dimmest ones will be rendered as vertex lights.

Use this from scripting if you want to have finer control than offered by quality settings levels.
	// Use at most one pixel light for every object

QualitySettings.pixelLightCount = 1;
using UnityEngine;
using System.Collections;

public class Example : MonoBehaviour {
    void Example() {
        QualitySettings.pixelLightCount = 1;
    }
}
import UnityEngine
import System.Collections

public class Example(MonoBehaviour):

	def Example() as void:
		QualitySettings.pixelLightCount = 1

See Also: Quality Settings.