| Summary: | 碩士 === 國立臺南藝術大學 === 博物館學與古物維護研究所 === 105 === Exhibition lighting in museums or art museums nowadays can be roughly divided into traditional lighting and solid-state lighting (SSL). For the past few years, facing the crisis of global warming, light-emitting diode (LED), as the major source of illumination in museums, has played a vital role for its advantage of energy efficiency. Under the background of environmental consciousness, energy-saving, updating display lighting, and collection safety have become the main concerns for curators and conservators when it comes to exhibition lighting. However, no matter which type of lighting is applied, all lighting will result in irreversible deterioration to museum collections. Therefore, lighting designers and conservators in the museums should discuss about appropriate lighting policies by mutual consent.
This thesis begins with the viewpoint of collection safety. It summarizes all the possible lighting factors that cause fading to the collections, such as luminance, time of exposure, UV radiation, spectral power distribution, Harrison relative damage factor, color rendering index, correlated color temperature, blue radiation, irradiance, etc. The results of experiments from the past will be compared and analyzed.
On the other hand, the thesis examines the test results of photo-degradation by using Halogen lamps and LED as lighting sources with LightCheck® Ultra, Blue Wool Standard and Polaroid SX-70 Integral Film as samples. Both lighting sources were tested under 420,000 lux·hr of accumulated exposed time respectively. Overall, test results revealed that fading caused by tungsten halogen lighting is greater than LED lighting, yet test results also showed that a few samples receiving LED lighting fade more quickly than the ones receiving tungsten halogen lighting. From former literatures and the use of integrating sphere testing (LM-79-08) to compare the features of lighting sources with the results of fading, the causes of fading are summarized as followed. First, the samples might be affected by certain wavelengths and start to fade. Second, light sources with less than 90 CRI cause fading or affect the realness of presentation. Third, the amount of irradiance is also relevant to fading.
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