Penumbrella is a night art installation which questions the amount of wasted light in our nocturnal cities. It is a zero energy device which leeches off the lit surroundings in order to power itself. The light pollution in Central London is so extreme that it can charge solar panels at night. Mini solar cells were used to power the installation and convey the immediate energy conversion without batteries or sensors.

In an era when both the meaning & perception of darkness are diluted, the name of this installation is derived from Penumbra which means the lighter edge surrounding the perfect shadow (Umbra) of an eclipsed object.