Describir: Lighting developments exhibited at Photokina 1980 /

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