An assessment method for evaluating colour rendering properties of light sources
Paper in proceedings, 2015
We present an assessment method to evaluate how the spectral power distribution of light
influences the perception of colours and small colour differences. Included in the method are
several ways to measure properties of reflected light with a spectroradiometer, visual
assessments of perceived colours, and a visual performance test that aims at identifying an
individual minimum colour contrast visibility threshold.
In a first application of the assessment method, we used a colour contrast test chart printed
on paper and studied it under the illumination of three LED light sources, halogen light and
daylight. We concluded that the visual performance test was effective for reviling visibility
thresholds for colour contrasts and that the method has potential for understanding the
influence of spectral power distribution on perceived colour and visual performance. The
methodology can be useful for optimizing illumination for individual needs.