PointLight not working if more than 3

FULL PRODUCT VERSION :
java version "1.8.0_45"
Java(TM) SE Runtime Environment (build 1.8.0_45-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.45-b02, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Linux: 3.16.7-21-desktop x86_64bit
OpenSuse 12.3 Gnome 3.14.2

EXTRA RELEVANT SYSTEM CONFIGURATION :
processor:Intel Core2 Duo CPU E7300 @ 2.66GHz × 2
GPU:Intel 945G



A DESCRIPTION OF THE PROBLEM :
I tried to add > 3 javafx.scene.PointLight into a scene but i could see only 3 lights. Cant we add more than 3 lights into single scene??

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
add more then 3 lights to scene


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
all javafx.scene.PointLight start working
ACTUAL -
only 3 javafx.scene.PointLight start working

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------

import java.util.*;

import javafx.event.*;
import javafx.application.Application;
import javafx.scene.*;
import javafx.scene.input.*;
import javafx.stage.Stage;
import javafx.scene.layout.*;
import javafx.geometry.*;
import javafx.scene.transform.*;
import javafx.animation.*;

import javafx.scene.control.*;
import javafx.scene.shape.*;
import javafx.scene.paint.*;


public class JFXMainCode extends Application {
ArrayList<KeyCode> inputKeys = new ArrayList<KeyCode>();
public static void main(String[] args) {
Application.launch(args);
}

@Override
public void start(Stage primaryStage) {
Group root3DGroup = new Group();

Box testBx = new Box(100, 100, 100);
testBx.setMaterial(new PhongMaterial(Color.ORANGE));
root3DGroup.getChildren().add(testBx);

PointLight rightlight = new PointLight(Color.WHITE);
rightlight.setTranslateX(150);
root3DGroup.getChildren().add(rightlight);

PointLight leftLight = new PointLight(Color.WHITE);
leftLight.setTranslateX(-150);
root3DGroup.getChildren().add(leftLight);

PointLight frontLight = new PointLight(Color.WHITE);
frontLight.setTranslateZ(-150);
root3DGroup.getChildren().add(frontLight);

PointLight backLight = new PointLight(Color.WHITE);
backLight.setTranslateZ(150);
root3DGroup.getChildren().add(backLight);

PointLight upLight = new PointLight(Color.WHITE);
upLight.setTranslateY(-150);
root3DGroup.getChildren().add(upLight);

PointLight downLight = new PointLight(Color.WHITE);
downLight.setTranslateY(150);
root3DGroup.getChildren().add(downLight);


PerspectiveCamera camera = new PerspectiveCamera(true);
camera.getTransforms().addAll(new Translate(150, -100, -200), new Rotate(-20, Rotate.X_AXIS), new Rotate(-30, Rotate.Y_AXIS));
camera.setFarClip(2000);
root3DGroup.getChildren().add(camera);

Scene scene3D = new Scene(root3DGroup, 400, 400, true, SceneAntialiasing.BALANCED);
scene3D.setFill(Color.BLACK);
scene3D.setOnKeyPressed((KeyEvent e) -> {
KeyCode code = e.getCode();
if(!inputKeys.contains(code))
inputKeys.add(code);
});
scene3D.setOnKeyReleased((KeyEvent e)-> {
KeyCode code = e.getCode();
inputKeys.remove(code);
});
scene3D.setCamera(camera);


primaryStage.setScene(scene3D);
primaryStage.sizeToScene();
primaryStage.show();


new AnimationTimer() {
public void handle(long currentNanoTime)
{
double movSpeed = 7;
if (inputKeys.contains(KeyCode.SHIFT))
movSpeed = 2;

if (inputKeys.contains(KeyCode.A))
camera.setTranslateX(camera.getTranslateX() - movSpeed);
else if (inputKeys.contains(KeyCode.D))
camera.setTranslateX(camera.getTranslateX() + movSpeed);

if (inputKeys.contains(KeyCode.W))
camera.setTranslateZ(camera.getTranslateZ() + movSpeed);
else if (inputKeys.contains(KeyCode.S))
camera.setTranslateZ(camera.getTranslateZ() - movSpeed);


if (inputKeys.contains(KeyCode.UP))
camera.getTransforms().add(new Rotate(-(movSpeed/3.5), Rotate.X_AXIS));
else if (inputKeys.contains(KeyCode.DOWN))
camera.getTransforms().add(new Rotate(movSpeed/3.5, Rotate.X_AXIS));


if (inputKeys.contains(KeyCode.RIGHT))
camera.getTransforms().add(new Rotate(movSpeed/3.5, Rotate.Y_AXIS));
else if (inputKeys.contains(KeyCode.LEFT))
camera.getTransforms().add(new Rotate(-(movSpeed/3.5), Rotate.Y_AXIS));


if (inputKeys.contains(KeyCode.ADD))
camera.setTranslateY(camera.getTranslateY() - movSpeed);
else if (inputKeys.contains(KeyCode.SUBTRACT))
camera.setTranslateY(camera.getTranslateY() + movSpeed);
}
}.start();
}
}
---------- END SOURCE ----------