There is something wrong with my GL_LIGHT0 dynamic position.
My normals look to be ok.. but when I start to use glLightfv for positionning my light according to the cam's position, the result is really weird...

My goal is to make a pointLight thats follows the camera...

And for those who will ask me why i use opengl instead of processing's commands, i just need it, for performance and for fancy things  

Code:

import processing.opengl.*;
import javax.media.opengl.*;
import damkjer.ocd.*;

PGraphicsOpenGL pgl;
GL gl;

Camera cam;

float halfsize = 25;

void setup(){
  size(720, 480, OPENGL);
  
  pgl = (PGraphicsOpenGL) g;
  gl = pgl.gl; 

  cam = new Camera(this, 55, 65, -50);  
  
}

void draw(){
  
  gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
  
  gl.glEnable(GL.GL_DEPTH_TEST);
  gl.glEnable(GL.GL_LIGHTING);
  gl.glEnable(GL.GL_LIGHT0);
  gl.glEnable(GL.GL_COLOR_MATERIAL);
  
  cam.circle(0.02);
  cam.feed();  
  
  float[] p = cam.position();    
  gl.glLightfv(GL.GL_LIGHT0, GL.GL_POSITION, new float[]{p[0], p[1], p[2], 0.0}, 0);
  
  pgl.beginGL();  
    gl.glPushMatrix();
     
    gl.glBegin(GL.GL_QUADS);
    gl.glColor3f(0.9f, 0.2f, 0.4f);
    
    gl.glNormal3f( halfsize, halfsize,-halfsize); // Normal 
    gl.glVertex3f( halfsize, halfsize,-halfsize); // Top: Top Right  
    gl.glNormal3f(-halfsize, halfsize,-halfsize); // Normal  
    gl.glVertex3f(-halfsize, halfsize,-halfsize); // Top: Top Left  
    gl.glNormal3f(-halfsize, halfsize, halfsize); // Normal  
    gl.glVertex3f(-halfsize, halfsize, halfsize); // Top: Bottom Left  
    gl.glNormal3f( halfsize, halfsize, halfsize); // Normal  
    gl.glVertex3f( halfsize, halfsize, halfsize); // Top: Bottom Right  
    
    gl.glNormal3f( halfsize,-halfsize, halfsize); // Normal  
    gl.glVertex3f( halfsize,-halfsize, halfsize); // Bottom: Top Right  
    gl.glNormal3f(-halfsize,-halfsize, halfsize); // Normal  
    gl.glVertex3f(-halfsize,-halfsize, halfsize); // Bottom: Top Left  
    gl.glNormal3f(-halfsize,-halfsize,-halfsize); // Normal  
    gl.glVertex3f(-halfsize,-halfsize,-halfsize); // Bottom: Bottom Left  
    gl.glNormal3f( halfsize,-halfsize,-halfsize); // Normal
    gl.glVertex3f( halfsize,-halfsize,-halfsize); // Bottom: Bottom Right
    
    gl.glNormal3f( halfsize, halfsize, halfsize); // Normal  
    gl.glVertex3f( halfsize, halfsize, halfsize); // Front: Top Right  
    gl.glNormal3f(-halfsize, halfsize, halfsize); // Normal
    gl.glVertex3f(-halfsize, halfsize, halfsize); // Front: Top Left  
    gl.glNormal3f(-halfsize,-halfsize, halfsize); // Normal
    gl.glVertex3f(-halfsize,-halfsize, halfsize); // Front: Bottom Left  
    gl.glNormal3f( halfsize,-halfsize, halfsize); // Normal
    gl.glVertex3f( halfsize,-halfsize, halfsize); // Front: Bottom Right 
    
    gl.glNormal3f( halfsize,-halfsize,-halfsize); // Normal
    gl.glVertex3f( halfsize,-halfsize,-halfsize); // Back: Top Right  
    gl.glNormal3f(-halfsize,-halfsize,-halfsize); // Normal
    gl.glVertex3f(-halfsize,-halfsize,-halfsize); // Back: Top Left  
    gl.glNormal3f(-halfsize, halfsize,-halfsize); // Normal
    gl.glVertex3f(-halfsize, halfsize,-halfsize); // Back: Bottom Left  
    gl.glNormal3f( halfsize, halfsize,-halfsize); // Normal
    gl.glVertex3f( halfsize, halfsize,-halfsize); // Back: Bottom Right    
    
    gl.glNormal3f(-halfsize, halfsize, halfsize); // Normal
    gl.glVertex3f(-halfsize, halfsize, halfsize); // Left: Top Right  
    gl.glNormal3f(-halfsize, halfsize,-halfsize); // Normal
    gl.glVertex3f(-halfsize, halfsize,-halfsize); // Left: Top Left  
    gl.glNormal3f(-halfsize,-halfsize,-halfsize); // Normal 
    gl.glVertex3f(-halfsize,-halfsize,-halfsize); // Left: Bottom Left  
    gl.glNormal3f(-halfsize,-halfsize, halfsize); // Normal 
    gl.glVertex3f(-halfsize,-halfsize, halfsize); // Left: Bottom Right  
    
    gl.glNormal3f( halfsize, halfsize,-halfsize); // Normal 
    gl.glVertex3f( halfsize, halfsize,-halfsize); // Right: Top Right  
    gl.glNormal3f( halfsize, halfsize, halfsize); // Normal
    gl.glVertex3f( halfsize, halfsize, halfsize); // Right: Top Left  
    gl.glNormal3f( halfsize,-halfsize, halfsize); // Normal
    gl.glVertex3f( halfsize,-halfsize, halfsize); // Right: Bottom Left  
    gl.glNormal3f( halfsize,-halfsize,-halfsize); // Normal
    gl.glVertex3f( halfsize,-halfsize,-halfsize); // Right: Bottom Right  
      
    gl.glEnd();  
      
    gl.glPopMatrix();  
  pgl.endGL();
  
} 

thank you