code: protected BufferedImage create_GLOW_Image(final int WIDTH, final Color GLOW_COLOR, final boolean ON, final GaugeType GAUGE_TYPE, final boolean KNOBS, final Orientation ORIENTATION) {
          switch (getFrameType()) {
              case ROUND:
                  return GLOW_FACTORY.createRadialGlow(WIDTH, GLOW_COLOR, ON, GAUGE_TYPE, KNOBS, ORIENTATION);
              case SQUARE:
                  return GLOW_FACTORY.createLinearGlow(WIDTH, WIDTH, GLOW_COLOR, ON);
              default:
                  return GLOW_FACTORY.createRadialGlow(WIDTH, GLOW_COLOR, ON, GAUGE_TYPE, KNOBS, ORIENTATION);
          }
      }
docs: Returns an image that simulates a glowing ring which could be used to visualize
  a state of the gauge by a color. The LED might be too small if you are not in front
  of the screen and so one could see the current state more easy.
  @param WIDTH
  @param GLOW_COLOR
  @param ON
  @param GAUGE_TYPE
  @param KNOBS
  @param ORIENTATION
  @return an image that simulates a glowing ring