Multicolored concrete lampshade : aproximatively 450g  
  Outter surface is smooth while inner surface is rough  
  Spirocolor lampshades are opalescent where concrete is the thinnest  

  Video © Laurent Milon + Baptiste Viala, Ensci 2008 
  "Spirocolor" concrete lights
© Laurent Milon & Baptiste Viala, Ensci 2008
This project is linked to the Aerocolor project, and was made in collaboration with Baptiste Viala : another student of my school.
We wanted to make a concrete light that would be light enough to be suspended. It's made of various coloured concretes, issued from Baptiste's experiments.