050
PROJECT / SCOTTISH NATIONAL PORTRAIT GALLERY, EDINBURGH, SCOTLAND Photograph: Andrew Lee
The library is lit traditionally but with a modern system. It is given a Victorian feel with custom made pendants.
PROJECT DETAILS
Scottish National Portrait Gallery, Edinburgh, Scotland Client: National Galleries of Scotland Architect: Page \ Park Lighting Design: FOTO-MA
who are responsible and, of course, the carbon footprint is extremely small. All of these things are part of the deci- sion of what you do. I wouldn’t say that for every situation I would choose LED but I’m not afraid of the future. A lot of emotive words are used in the debate about LED and I think it lessens the debate because it’s not balanced. This whole project has been a collective process and that is vital to a project’s success. RS: A lot of the debate is centred around earlier, single phosphor LEDs that have a pronounced peak in the blue spectrum that had an effect on sensitive pigments. With
According to the Getty Conservation Institute “white LEDs pose no risks above and beyond filtered tungsten halogen” to colorants as shown in the ISO ‘Blue Wool test’ results below.
NAME
ISO Blue Wool 1-3 Ukon Zakuro Kihada Weld
Old Fustic Onion Skin Annatto Safflower Sappan wood Erythrosine B Rose Bengal Tartrazine
Patent Blue Crystal Violet Rhoduline Rhodamine B
TYPE
Japanese Dye Japanese Dye Japanese Dye European Dye European Dye European Dye European Dye Japanese Dye Japanese Dye Modern Modern Modern Modern Modern Modern Modern
LED FADING RATE
All Slower
Slightly Slower No Different No Different No Different No Different No Different No Different Slightly Slower Slightly Slower No Different Slightly Slower No Different Slightly Slower No Different No Different Slightly Slower
dual phosphor and better LEDs and mod- ules, this is now not the case. If you look at research from the Getty (see Blue Wool test table, below left), the fading of pigments is less than with halogen. GF: One of the key things that helped the conservators was that they had access to spectral analysis software that any different light source can be plugged into. Instead of giving analyses that were independent of an overview, it meant they could compare all light sources together. That was a key mo- ment for all of us. It revealed that the prob- lems with LVTH sources – the peaks at the red end of the spectrum and thermal issues – were more damaging than the statements being made about the blue spikes of LED. If you look at the studies arguing against the use of LED in museums, they are based on technology that is five years old. Technol- ogy has moved so far in that period that it wasn’t a scientific response, it’s a lot of people perpetuating soundbites. RS: Another point is the efficacy of LEDs where values of 35lm/W are quoted. But this Mike Stoane Lighting system is achiev- ing 60lm/W from our modules. GF: We’re even dimming those down and adding louvres because they’re so powerful. DH: We have on-board dimmers on 95% of the fittings but towards the end of the project we came across some spaces that needed mains dimming. Again, this was something we weren’t able to do at the beginning of the project. It’s been the story of the project really – evolution rather than revolution. That’s something we intend to continue to do – using the same system but tweaking it to make things smaller, better, more efficient.
www.foto-ma.com
LIGHTING SPECIFIED Galleries
Mike Stoane Lighting Track Type X spotlights and wallwashers with Xicato XSM 3000k 2000lm module and 700mA driver (giving 1500lm at 25W (60lm/W))
Mike Stoane Lighting Track Type X Fatty spotlights with Xicato XSM 3000k 2000lm module and 1000mA driver (giving 2000lm at 36W (55lm/W)) ERCO 3-Circuit Track
Great Hall
Mike Stoane Lighting Track Type X Track Spotlight with Xicato XSM 3000k 1500lm module and 700mA driver Mike Stoane Lighting Surface Mounted Miniature IP66 Rated Spotlight (Power LED 3W)
Mike Stoane Lighting Track Mounted Adjustable ‘MC7’ Narrow Beam Spotlight (HID CDM)
Mike Stoane Lighting Suspended Pendant Mike Stoane Lighting Track Mounted, Miniature Spotlight Antares / Flos Track Mounted Adjustable ‘Pure’ Narrow Beam Spotlight
ERCO Wall Mounted Assymetric Metal Halide Uplight ERCO 3-Circuit Track
Other Areas
Mike Stoane Lighting Track Type X Fatty spotlights with Xicato XSM 2000lm module and 1000mA driver (giving 2000lm at 36W (55lm/W))
Mike Stoane Lighting MR16 Fixed Downlight Mike Stoane Lighting Rectangular Linear T5 Mike Stoane Lighting Recessed Miniature LED Marker Light Mike Stoane Lighting Wire Suspended Boxlight Mike Stoane Lighting T5 Surface Mounted Boxlight Mike Stoane Lighting T5 Surface Mounted Miniature Boxlight Mike Stoane Lighting Cylindrical Pendant Direct/Indirect Lumi- naire (designed bespoke by FOTO-MA)
Mike Stoane Lighting Suspended Linear Direct/Indirect Luminaire Mike Stoane Lighting Surface Mounted Miniature IP66 Rated Spotlight
Mike Stoane Lighting Surface Mounted Diffuse Downlight (designed bespoke by FOTO-MA)
Mike Stoane Lighting Wall Mounted Decorative Diffuse Luminaire (designed bespoke by FOTO-MA)
Mike Stoane Lighting Satin Acrylic Encased IP66 Fluorescent T5 Mike Stoane Lighting Linear High Output LED Channel Targetti Poulsen Exterior Rated In-ground Uplight Antares / Flos Surface Mounted Twin Adjustable MR16 Downlight Encapsulite Surface Mounted Linear Fluorescent Batten Targetti Poulsen Wall Mounted Square Direct/Indirect Luminaire Viabizzuno Wall Mounted Direct/Indirect Luminaire XAL ‘Minimal 60’ Linear Fluorescent Downlight XAL Surface Mounted Maintained Emergency Bulkhead Luminaire Chelsom Decorative Pendant (designed bespoke by FOTO-MA) ERCO Wall Mounted Assymetric Compact Fluorescent Uplight OSRAM Surface Mounted Compact Fluorescent Luminaire ERCO 3-Circuit Track
Refurbishment of existing street lanterns by BBESL
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