Welsh artist Cerith Wyn Evans is more familiar than most with London's Tate Britain. He strolled its iconic galleries as a guard in the late seventies, while studying at Central St Martins. With a beautiful sense of symmetry, he has returned 40 years later, as a much celebrated artist.

Wyn Evans' new masterwork, Forms in Space...by Light (in Time), fills and stretches the Duveen Galleries. Annually, Tate Britain invite an artist to develop a work in response to the grand neo-classical hall, that addresses the heritage of the space as a sculpture gallery.

Photography: Joe Humphrys / Tate Photography

'Cerith's installation sits beautifully within the space, unfolding as you walk through,' explains Clarrie Wallis, Tate's Senior Curator of Contemporary British Art. The neon experience builds, from a single 'peep hole' ring in the South Duveens, through which you can glimpse swirls of radial light and an imposing octagon in the central gallery. The fractured neon fragments look like frantically drawn sparkler-lines on fireworks night.

But there's method and logic within these celestial scribbles. Hidden in the design are references to a host of highbrow sources, from Japanese 'Noh' theatre, to Marcel Duchamp's The Bride Stripped Bare by her Bachelors, Even (The Large Glass), 1915-23. Don't worry if you missed them. The beauty of rendering precise (verging on obscure) references in such a celebratory neon explosion allows for multiple - if not endless - interpretations.

Each way you look at the sprawling 2km of neon tubing, a different shape or symbol emerges. No small thanks to the elegant way in which the structures have been painstakingly suspended. 'There were over 1000 fixing points, and obviously we couldn't drill 1000 holes in the Grade II listed building,' Wallis explains. 'We had to work with structural engineers very intensely, so as to be completely happy and convinced that we would be able to remove it without damaging the fabric of the building.'

Though it seems too soon to be discussing the installation's removal, Wallis has a point. It's a visibly fragile, delicate sculpture - whose impermanence makes it more intriguing. As it is a site-specific sculpture, it can't be recreated elsewhere. What's more, because the neon tubes are filled with a constantly moving stream of pulsing, vibrating gasses, visitors will never see the same sculpture twice.

RELATED TOPICS: INSTALLATIONS, LIGHTING, LONDON EXHIBITIONS