Heritage lighting 2.0

The Lumi-R device, application dedicated to virtual and real lightings of Rennes heritage, received last November the “2018 Award for the built heritage lighting design” by the ACE (French association of lighting designers).

During the development in 2011 of the lighting master plan for the city of Rennes, CONCEPTO (the Parisian lighting design agency) suggested elected officials to look differently on historic buildings, and to no longer consider them as architectural objects to highlight systematically but rather as urban elements for developing exchanges and imagination.

The city of Rennes had a very low number of heritage illuminations, compared to other French cities of the same size. This deficit seemed to offer a chance and a unique opportunity to rethink the idea of a set of illuminated monuments, static and permanent.

The lighting designers had imagined at the beginning to highlight small parts of a few major heritage buildings not yet illuminated (portal, window, turret) to attract the gaze of passers-by and arouse a questioning and a rediscovering of the monument at night.

At the same time, CONCEPTO wanted to develop in collaboration with the tourism office of Rennes free virtual night walks in order to discover on a smartphone, or a tablet computer on loan, computer 2D night images and 3D videos representing different illuminations of the monuments.

This original, innovative and unique approach, in France and abroad, offered in the eyes of the lighting designers the advantage of multiple nocturnal readings of Rennes heritage, possibly renewable in time, without energy consumption, without major investments and without difficult work of lighting fixtures installation and unsightly wiring on historic buildings affected.

From the beginning of the study, CONCEPTO wanted that these graphics and videos dedicated to the virtual illuminations would be visible only at night and accessible only to the approach of the building concerned (within a maximum radius of 50 meters), in order to encourage and induce the physical movement of the visitors and tourists in the city of Rennes.

Gradually, fragments of real illuminations have been reduced to two facades only, while the virtual illuminations have been developed for 7 historical buildings.

This first evening stroll in the Rennes old city center was inaugurated in September 2018.

The Lumi-R application, downloadable on smartphone and tablet, is free.
It allows today two features:

• activate virtual lightings and discover 2D computer renderings and 3D videos in 180 and 360 degrees visions (videos chronicling old scenes in connection with the façade or the street concerned), with the possibility of switch immersive mode, using a virtual reality free cardboard helmet for installing the smartphone.
• Turn on two real illuminations and interact directly on opportunities for lighting the facades.

The night tour is offered freely, without defined order: the application allows to geolocate “activatable” sites. Everyone can use the device according to his desires. Application logos are thrown to the ground to signal to visitors the best viewing angle.

Lumi-R is a scalable application, the number of virtual illuminated facades should extend in the coming years, on other areas of downtown.

This very innovative achievement, in terms of technology, meets perfectly the new requirements to reduce the energy bill of the cities and the light pollution.

The Lumi-R system aim to design differently the heritage architectural lightings in the cities and to imagine a virtual nighttime city, able to offer to citizens different images and nocturnal silhouettes to experiment.

Client: City of Rennes.
Lighting design: CONCEPTO, Roger Narboni and Fanny Guérard.
Virtual dimension: La Fabrique d’Etincelles.
Mobile application: My Orphéo.
3D modeling: E.magein3D.
Installer: Bouygues E&S


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