A light installation by artist Wolfgang Flammersfeld is pictured at Palmengarten during the exhibition "Winterlicht" (winter light) in Frankfurt January 14, 2013. REUTERS/Lisi Niesner (GERMANY - Tags: SOCIETY)

- Image ID: 2CX9PNP

A light installation by artist Wolfgang Flammersfeld is pictured at Palmengarten during the exhibition "Winterlicht" (winter light) in Frankfurt January 14, 2013. REUTERS/Lisi Niesner (GERMANY - Tags: SOCIETY)

REUTERS / Alamy Stock Photo

Image ID: 2CX9PNP