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CS101 Scheda tecnica(PDF) 2 Page - Lumileds Lighting Company |
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CS101 Scheda tecnica(HTML) 2 Page - Lumileds Lighting Company |
2 / 3 page CS101 Amsterdam Welcomes New Age in Museum Lighting Case Study 20150330 ©2015 Lumileds Holding B.V. All rights reserved. 2 customized using a magnetic mounting scheme with remotely- positioned driver. The light racks contain 3,800 StyllD fixtures with Fortimo LED Spotlight Module Tight Beam containing LUXEON S LEDs. Ceiling lighting was provided by approximately 1.8 kilometers of Fortimo strip up-lighting, also positioned within the light racks. This approach allows seamless coherent lighting of the ceilings of varying heights in the galleries. LED Advantages One benefit to the combination of Philips Fortimo LED SLM Tight Beam and LUXEON S LEDs is the small light emitting surface (LES). Small LES allows a smaller optical reflector design, enabling very narrow beams, including 5° and 10° beams with high center-beam candlepower. In museum applications, a uniform and sharp beam pattern is possible with a crisp single-point-source shadow, which enhances the texture and sparkle of artifacts. To minimize glare from the light sources, an internal glare shield was developed for the StyllD fixture. When not directed at the artwork, the Rijksmuseum lighting mimics the color rendition of natural daylight (5000K). Additional benefits to the use of LED lighting over halogen include a typical lifetime that is 10x longer, significantly impacting maintenance costs, little heat generation and no ultraviolet radiation, which are known to damage artwork. Control and Future-Proofing The lighting control scheme was designed to enable museum staff to set lighting levels on individual works of art. The Philips’ Dynalite DALI control system and web-based control interface were installed to provide flexibility in lighting including the dimming via a mobile application and iPad. Using DALI-controlled Xitanium drivers, practical dimming cut-off levels were set at 10%, which proved adequate for all but a few artifacts where neutral-density glass lenses were incorporated. The control system also addresses light output, which is constant, ensuring long-term lumen depreciation of the LEDs. Even given the long lifetime of LEDs, repair-ability and upgrade-ability must be considered. Philips designed for the future with Zhaga-compliant LED modules. Both the spot fixtures and LED strip up-lighting can be upgraded or repaired at a later date using standard Zhaga-compliant modules. Viewing the Rijksmuseum The renovated Rijksmuseum reopened to the public on April 13, 2013. It is the largest gallery space lit by LEDs, containing ¾ million LEDs. All parts of the museum including the exterior and façade use LED lighting. To encourage visitation and education, the museum has made high resolution versions of 125,000 of its painting and artifacts available on its website, www.rijksmuseum.nl. While online viewing can provide insight into the luminance and color rendering delivered in these artworks, only a visit to the Rijksmuseum can fully reveal the beauty that LED lighting elicits from the works of the Dutch Masters. “At the heart of all the decisions we take are two aspects, the visitor’s experience of the museum and the preservation of our art. We chose LED lighting for firstly, the high quality of the light emitted, and secondly the color rendering of LED lighting, which is very close to that of daylight. This allows the art to be viewed in the best light possible to bring out all the colors and details that the artist intended us to see.” — Tim Zeedijk Head of Exhibitions, Rijksmuseum |
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