Exploring the relationship between LEDs Lighting, Urban materials chromaticity and People: measurements, design and evaluation

The aim of the research was to define urban lighting design insights, by reflecting on the relationship between urban material properties (chromaticity and spectral reflectance) and specific LEDs based lighting spectral emissions to enhance the nightly image of cities and to achieve efficient solutions. A preliminary selection of urban material, representative of different “urban colourscapes”, was then followed by the definition of several lighting receipts (illuminants) which were defined by three research hypotheses. An exploratory perceptive user assessment was set up and performed to derive some insights about the transformation of the user’s perception about the same material with different SPDs, to significantly enhance the attractiveness and appeal toward the architectural and urban surfaces.