The visual effect of the Furia is designed to remove the final inhibition that often sees fish follow the lure rather than strike it, the visual signals. Furia's 'Optical Trap' is made up of black which plays a part in the location of a potential target, orange/yellow which adds the luminous value of a moving body and red which adds a factor of aggressiveness and energy. The Furia is an effective spinner to have in your arsenal in both brightly lit and deeper, darker waters as well.