The introduction to the art museum of the LED light advances now. However, there is not the standard of the LED light as the art museum use, and there are a lot of art museums where I introduced a wrong LED light into. I show a technique and the problem of the current LED light and think about the way of the future art museum illumination.

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I would like to introduce a gallery renewal and earthquake resistant renovation project for the TOYOKAN (Asian Gallery) of the Tokyo National Museum. This project comes at a time when the implementation of LEDs is now the backdrop for lighting design. The goal of this gallery renewal is to aspire to international museums levels of gallery and lighting design. The lighting concept aims to "unify the architectural space and gallery environment".

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Textile cultural properties are very sensitive to optical radiation and are ranked in mid and high responsive category in CIE Technical Report (CIE-15 7-2004). In this article the evaluated results of discoloration of blue scale and natural dyes by fluorescent and white LED lamps and the performance of white LED lamp are discussed from the conservation point of view. In evaluation with a blue scale grade 1, all the white LED lamps have smaller color fading compared with the conventional white fluorescent lamps (W), when both provide the same quantity of light exposure. Meanwhile, the color fading with the museum fluorescent lamp (NU) was similar to that with the white LED lamp (D) that had approximately the same color temperature. But the yellow dyes, which are rather easily fading, showed more discoloration by (D) than (NU) and further research is necessary.

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Recently, the performance of LED light sources has been improved significantly, therefore those has been used even for museum lighting where has very severe color rendering properties. When considering the application of LED light sources to museum lighting, we have a couple of questions, about whether Ra, Ri calculated by CIE/JIS color rendering method can properly evaluate color appearance of objects illuminated by LED lighting or not. The new color rendering valuation method now discussed in CIE is outlined.

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Toshiba made the partnership contract with the Louvre museum in June, 2010. In this project, all old luminaires of the Pyramid, the Cour Napoleon, and the Cour Corree of the Louvre museum will be replaced to the new LED luminaires. The Louvre museum of the World Heritage is gracefully illuminated by LED luminaires at night time. The installation of the luminaires at the Pyramid and Pyramidion was completed in December, 2011. After that, the installation at the Cour Napoleon finished in May, 2012. Finally, the installation at Cour Corree will finish in 2013. In this project, 4500 luminaires which have a bad influence for the environment will be replaced to 3200 LED luminaires which need less power consumption. As a result, the power consumption in one year will be reduced from about 714,000 kilowatt-hours to about 199,000 kilowatt-hours. The reduction rate of this power consumption will achieve 73%. And the amount of the CO_2 emission will be reduced about 17 tons in one year in France.

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Noh is mainly performed by using the natural light at an outdoor stage and artificial light at a Noh theater, though occasionally by firelights and candlelights. Noh performance harmonizes with these lights. It seems that the light of Noh stage plays significantly an important role to accentuate the architectural beauty of the stage and Noh performance. The purpose of this paper is to consider the light characteristics of Noh stage through the photometric terms such as illuminance and luminance according to several actual measurements.

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