Ghost for cast concrete is a luminous void created through a specific recessed housing fixed to the shutters before casting. The LED engine is only installed when the concrete surrounding the housing is completely dry, filling the void with light.
“The light blade comes from the concrete. When it's off, it disappears. No artifice, just a void in the concrete with brutal and magic inspiration: actually a technical prodigy, directly cast into the concrete, the product of a sophisticated and invisible genius to fuse architecture and light in a natural way.” M. Sadler