On 11/01/2015 09:43, Martin wrote:
This article says it wasn't caused by LED lighting. It was yellows that
deteriorated not reds.

IAC very unlikely to be LED lighting. The colours are in a series of
very narrow bands, usually blue/green/red, or in cheap ones blue/yellow.
They use fluorescence to generate the red/yellow/green from the blue.

Unlike (compact) fluorescent lights, which use UV from mercury vapour
rather than blue. UV is seriously bad news for damaging things.

Neither has very good colour rendition. I'd hope a gallery would keep
some kind on incandescent to avoid problems from discontinuous spectra.

Andy