Describir: Lighting developments exhibited at Photokina 1980 /

 ______     ______    _____     _____     _____      ___     _    _   
|      \\  /_   _//  / ____||  |  ___||  / ____||   / _ \\  | \  / || 
|  --  //   -| ||-  / //---`'  | ||__   / //---`'  | / \ || |  \/  || 
|  --  \\   _| ||_  \ \\___    | ||__   \ \\___    | \_/ || | .  . || 
|______//  /_____//  \_____||  |_____||  \_____||   \___//  |_|\/|_|| 
`------`   `-----`    `----`   `-----`    `----`    `---`   `-`  `-`  
                                                                      
 __   __  
 \ \\/ // 
  \ ` //  
   | ||   
   |_||   
   `-`'