Performance pieces featuring glow-in-the-dark grannies don’t come along very often. But there is such an installation at the Gazelli Art House gallery in London which is showing a luminous site-specific work, entitled Anon, by the artist duo Walter & Zoniel. Old age pensioners, or living sculptures, sit in the gallery window, staring wistfully at the stream of pedestrians passing by. The artists incessantly photograph their ageing subjects, the flashing cameras lighting up the pensioners’ faces and figures. These images are then projected on to the windows above the installation, creating a surreal alfresco mural. And the purpose of this piece? “The playful spirit of this fantastical piece—housing fluorescent geriatrics—allows a basis to pose much deeper questions around isolation within our society, our relationships to digital media, obsessions with photography and our cultural relationships towards ageing,” says a pithy gallery statement. Anon, which runs until 17 January, is part of the Lumiere London light festival.