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The paper is divided into two parts. Part 1 describes the activities in International Commission on Illumination (CIE) on the development of new colour rendering indices (CRI). Methods for conducting psychophysical experiment for assessing colour fidelity of sources are given in Part 2. It is envisaged that the methods proposed will be followed by the labs worldwide to generate new data to test different...
The aim of this research is to evaluate the performance of different uniform colour spaces and colour rendering indices on the colour fidelity of light sources. To achieve this aim, a psychophysical experiment was carried out which invited 10 observers to assess the colour differences of the identical samples viewed under two sources, using simultaneous colour matching and grey scale method. Percentages...
High flexibility of LED offers possibility to adjust parameters of lighting, like CCT (correlated color temperature), luminance, and spectral power distribution so that lighting can be made to have positive effects on people. This experiment investigated the effects of available lightings on visual performance and atmosphere feeling. Lightings in the experiment included: LED, energy-saving lamp, tungsten,...
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