<a href="https://en.wikipedia.org/wiki/Otto_Piene" class="extiw" title="en:Otto Piene">Otto Piene</a>, <i>Das Geleucht</i> (Mining Lamp), steel, glass, LEDs, 30 m high, 1998-2007. The mining lamp of the <i>Halde Rheinpreußen</i> (Moers, North Rhine-Westphalia, Germany).
<a href="//commons.wikimedia.org/wiki/User:Arnoldius" title="User:Arnoldius">Arnoldius</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>