code: public void setLightSpecular(int i, Color color) {
  		float[] tmpColor = {
  		    (float)color.getRed(),
  		    (float)color.getGreen(),
  		    (float)color.getBlue(),
  		    (float)color.getAlpha()
  		};
  		gl.glLightfv(GL2.GL_LIGHT0 + i, GL2.GL_SPECULAR, tmpColor, 0);
  	}
docs: Sets the specular color for No.i light.