Planet Under Construction (PUC), a light installation by a team from Woods Bagot’s Sydney studio, has been selected as part of this year’s Vivid Sydney: the Southern Hemisphere’s largest annual festival of light, music and ideas with an estimated half a million attendees.

Made of orange construction cones to symbolise our architectural work, PUC is a spherical lighting sculpture that mimics a planet. The celestial body features orange peaks as “volcanoes” that speak of energy and renewal.

Lights at its core will escape through cracks and holes in the structure, reacting to the sound of the passing train, and lighting patterns will be triggered by sensors around its base, creating a public interactive element.

PUC will be situated near the corner of George and Alfred Street under the Cahill Expressway in Circular Quay, making it an important marker near the point of entrance to the event for visitors coming from the train station and the city.

Vivid Sydney runs from 24 May – 10 June 2013.