The 3rd Senalux Level Pack adds another 72 levels to the game. It also introduces 7 new optical / optoelectrical components:

• the Emitter shines in a set color when it is illuminated in any color
  
• the two Circulators deflect a beam by 60° and 120° respectively
  
• the Attenuator reduces the intensity of a beam by 1
  
• the Amplifier doubles the intensity of a beam
  
• the Switch only lets light pass through when illuminated from the side
  
• the Inverting Switch does the opposite

With these new components it becomes possible to construct arbitrary logical circuits.