092 PROJECT / AMGUEDDFA CYMRU - NATIONAL MUSEUM WALES, CARDIFF, WALES
The evenly balanced horizontal illuminance from the Barrisol lightboxes gives the appearance of sky lights with no visible lamps and excellent blending of daylight with warm white colour temperatures from the ERCO Optec LED spotlights.
horizontal illuminance from the Barrisol lightboxes gives the appearance of sky lights with no visible lamps and excellent blending of daylight and warm white. “The more flexible the lighting system the better,” comments Upson. “We were therefore looking for a single fixture solution that would cater for various lighting scenarios, one where optics were either interchangeable or variable and one that provided individual fixture control. The addressable DALI system and ERCO’s Optec range gave us many interchangeable optical solutions.” The next question was whether the museum would choose LED over the more conventional halogen light source. The technical and curatorial departments liaised with the museum’s conservators with regards to their use so that they were able to approach the decision from various angles and nothing was left out. “On paper everything said that LEDs were the way forward, enabling us to reduce our energy footprint and costs
and providing many positives with regards to the conservation of our collections,” reveals Upson. “But the move over from one light source that we trusted greatly to a completely new one was slightly nerve racking. The biggest doubt related to whether the light quality would be good enough to light our contemporary art collections. We looked at many LED fixtures from various manufacturers and in the end after a couple of visits to galleries where ERCO had been commissioned to provide LED lighting, we opted for ERCO’s Optec LED range.” The Optec warm white LED wall washers were selected to provide perfect even vertical light and ensure a balanced contrast ratio throughout the spaces. The whole system is controlled via a DALI system and each gallery wall washer and light box can be adjusted individually. The galleries run on a dedicated on-board 365 day timer for ease of use and to minimise the energy consumption. The user friendly system is totally operated by the Amgueddfa Cymru
- National Museum Wales staff. “We are all very happy with the lighting system, the LED fixtures really compliment the ambient lighting in the galleries provided by the Barrisol light boxes. Making use out of the flexible optics, we are able to provide even wall washing and variable focused spotlighting in our new galleries. One thing we have noticed with the new LED fixtures is how colours at the cooler end of the spectrum now stand out a lot more than when lit with halogen. Many of our collections are now seen in an entirely new light, forgive the pun. Also if we were to compare the new LED fixture choice to that of choosing halogen, after nearly two years we are already making huge savings in our energy usage and due to their low heat output, our environmental control systems are not having to work so hard, again producing further savings and reduced maintenance.”
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