Describir: Lighting developments exhibited at Photokina 1980 /

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