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Dignified and economical: New light for Milan Cathedral

The Milan cathedral works organisation has been taking care of the completion and preservation of the cathedral for more than 600 years. Which makes all the more remarkable its decision to install new lighting in the church for the EXPO 2015 - based on a perception-oriented concept by lighting designers Ferrara Palladino e Associati - and highly efficient LED lighting technology supplied by ERCO.

Standing proudly as the third largest Gothic cathedral in the world, the Duomo di Milano was completed in 1858 after nearly five centuries of construction. Yet to this day its restoration and maintenance remains a constant focus of the “Veneranda Fabbrica del Duomo di Milano”, the historic organisation concerned with all operational aspects of the cathedral. With millions of visitors expected to converge on Milan for the EXPO 2015 from May, the monumental church interior now presents itself at its most dignified - innovatively illuminated by local lighting designers Ferrara Palladino e Associati. Next to aesthetics the clients based their decision on very pragmatic concerns: The LED lighting tools supplied by ERCO provide the means to implement a complex lighting solution while helping the Veneranda Fabbrica reduce the operating costs for maintenance and energy on a permanent basis.

This is an issue of key importance for the Veneranda Fabbrica in view of its formidable responsibilities working with limited resources. The old lighting system had consisted of 175 floodlights, each with 400W metal halide lamps, which had been mounted to the base of the vault at a height of up to 33m for a uniform, zenithal illumination of the interior. Arguably the most economical solution in its day, the technology from today’s vantage point was outdated and the system lacked aesthetic appeal. The low maintenance and energy efficiency of current LEDs, combined with the precision and light quality of innovative ERCO LED lenses, give lighting designers an altogether new scope for design.

In the new lighting concept LED luminaires from the Parscan range solve a variety of different lighting tasks with suitably nuanced power outputs and light distributions. An investment in light quality that will pay off in the long run considering the energy savings achieved as a result. Whereas the old system used a cool light colour resembling daylight, the new lighting with neutral white LEDs in 4000K creates a more pleasant ambience and renders the surrounding surfaces in the most natural colour. The lighting concept forms a consistent hierarchy of perception by using brightness contrasts in the room: discreet horizontal ambient lighting combines with brighter illumination for the vaulted ceilings, thereby reinforcing the sense of height and lightness as principal characteristics of Gothic architecture. Defined light accents direct the attention of the visitor onto the altars, pulpits and column capitals so richly adorned with sculptures. The result gives worshippers and tourists alike a tangible experience of the vast dimensions and artistic quality of this sacred place.

The Parscan spotlights in the naves are mounted in the same positions as their predecessors, at the base of the vault. LED lenses project the light precisely without spill light and in combination with the significant height of the light sources ensure good visual comfort. A compelling factor driving the decision of the lighting designers in the end, however, was the fact that ERCO LED spotlights with spot and narrow spot Spherolit lenses and outputs of up to 42W master the different lighting requirements in the cathedral with accuracy even from significant distances. The luminaires are mounted on track elements and for safety purposes additionally secured with steel ropes. During their installation, they were aligned precisely, locked in position with a fixing screw and dimmed to the required level of brightness using the integrated potentiometer. The vision of the lighting designers thereby became a reality, providing a lighting system that requires no maintenance for years to come thanks to the long life of the LED light sources. The bottom line presents a connected load that reduces by around two thirds, from 70kW to 23.7kW, even if there are now as many as 784 luminaires. A success that has earned the project an A+ rating for energy efficiency along with an Environment-Friendly Innovation Award 2015 by Italian environmental organisation Legambiente - and which may point the way ahead for innovative lighting in historic and sacred buildings.

Project data
Client: Cathedral works organisation “La Veneranda Fabbrica del Duomo di Milano”, Milan / Italy
Lighting designer: Ferrara Palladino e Associati, Milan / Italy
Photographer: Dirk Vogel, Dortmund / Germany
Completion: May 2015

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Über ERCO

Die ERCO Lichtfabrik mit Sitz in Lüdenscheid ist ein führender Spezialist für Architekturbeleuchtung mit LED-Technologie. Das 1934 gegründete Familienunternehmen operiert weltweit in knapp 40 Ländern mit über 60 Tochtergesellschaften, Niederlassungen und Vertretungen. Seit 2015 basiert das Produktprogramm vollständig auf LED-Technologie. Unter dem Leitmotiv "light digital" entwickelt, gestaltet und produziert ERCO in Lüdenscheid digitale Leuchten mit den Schwerpunkten lichttechnische Optiken, Elektronik und Design. Die Lichtwerkzeuge entstehen in engem Kontakt mit Architekten, Lichtplanern und Elektroplanern und kommen primär in den folgenden Anwendungsbereichen zum Einsatz: Work und Shop, Culture und Community, Hospitality, Living, Public und Contemplation. ERCO versteht digitales Licht als die vierte Dimension der Architektur - und unterstützt Planer dabei, ihre Projekte mit hochpräzisen, effizienten Lichtlösungen in die Realität zu überführen. Sollten Sie weiterführende Informationen zu ERCO oder Bildmaterial wünschen, besuchen Sie uns bitte auf www.erco.com/presse. Gerne liefern wir Ihnen auch Material zu Projekten weltweit für Ihre Berichterstattung.

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