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

Authors

  • Daria Casciani Politecnico di Milano
  • Maurizio Rossi Politecnico di Milano, Department of Design

DOI:

https://doi.org/10.23738/ccsj.i82017.07

Keywords:

Lighting Design, Urban Material, SPD, textures, Spectral Reflectance, Chromatic Saturation, LEDs

Abstract

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.

Author Biographies

  • Daria Casciani, Politecnico di Milano

    Daria Casciani, designer, research fellow and lighting specialists. She holds a PhD about the analysis, design and evaluation of the relationship between light, city and people. She currently collaborates in research activities about the new perspectives of the design of LED lighting systems at the Laboratorio Luce, Department of Design of the Politecnico di Milano. She also teaches at the Master in Lighting Design & LED Technology and is an Adjunct Professor at the School of Design of the Politecnico di Milano.

  • Maurizio Rossi, Politecnico di Milano, Department of Design

    Maurizio Rossi, Associate professor of Design at Politecnico di Milano. PhD in Computer Science at Università degli Studi di Milano. He is the President of the Associazione Italiana Colore. At Politecnico di Milano he is scientific director of the Laboratorio Luce, director of the Master in Lighting Design & LED Technology, director of the Master in Color Design & Technology, and member of the faculty of the PhD program in Design.

References

Bagordo G.M. (2012), ‘Materiale, colore, architettura’, in Colore e Colorimetria Vol. VIII/A: pp 347-353

Bellia L., Agresta N. and Pedace A. (2013) ‘Proposta di una metodologia per illuminare i centri storici’, Luce 307 /2014 ISSN 1828-0560: pp. 105-109

Bodrogi P., Csuti P., Szabò F. and Schanda J. (2005) ‘Why does the CIE Colour Rendering Index fail for white RGB LED light sources?’, AIC Colour ’05, Granada, Spain. 8-13

Borsotti M. (2012) ‘Architetture contemporanee e colore: amplificazioni di senso’ in Colore e Colorimetria Vol. VIII/A: pp 315-322

Casciani D., Musante F., Rossi M. (2014) ‘A work in progress on lighting the colours of urban materials: the night-time identity of the city revealed’, X Conferenza del Colore , GdC Associazione Italiana del Colore, Università degli Studi di Genova, 11-12 September 2014

CIE 136 - 2000, Guide to the lighting of urban areas

Commission Internationale de l’Eclairage. (1995). ‘Method of measuring and specifying colour rendering properties of light sources’. Vienna (Austria): CIE. Technical Report CIE 013.3-1995.

Davis W. and Ohno Y., (2005) ‘Toward an improved color rendering metric, in Fifth International Conference on Solid State Lighting’, Proc. SPIE , 5941, 59411G.

Davis W., Ohno Y. (2010), ‘Color Quality Scale’, Opt. Eng. 49(3) 033602 doi: 10.1117/1.3360335

Gardner C. (2006) ‘The use and misuse of coloured light in the urban environment’, Optics & Laser Technology, Vol. 38, No 4-6, pp. 366-376

Houser K., Tiller D. and Hu X. (2004) ‘Turning the fluorescent spectrum for the trichromatic visual response: A pilot study’. Leukos 2004;1:7–24.

Judd D.B., (1967) ‘A flattery index for artificial illuminants’, Illum Eng. 62:593-598.

Knight C. (2013), ‘Summary: Investigations on the use of LED modules for optimised colour appearance in retail applications’, available at: http://www.xicato.com/sites/ default/files/documents/Summary_Investigations_ on_the_use_of_LED_modules_for_optimized_color_ appearance_in_retail_applications.pdf

Lancaster M., (1996) ‘Colourscape’, London: Academy

Lynch K. (1960) ‘The image of the city’. The MIT Press, Cambridge

Nasar J. L. (1998) ‘The evaluative Image of the City’. Sage Thousand Oaks, CA

Rea M.S., Freyssinier J.P., (2013) ‘White lighting for residential applications’, Lighting Res. Technol. 2013; 45: 331–344

Schanda J., (2001) ‘City beautification by coloured lights – an art or kitsch’. Istanbul Lighting Conf. 2001

Schanda J., (2002) ‘The concept of colour rendering revisited’, CGIV ‘2002 First European Conference on Color in Graphics Imaging and Vision, Univ. Poitiers, France, 04. 2-5.

Schwendinger L. (2009) ‘City beautification: colour and light’, presented at CIHAC; Mexico City

Smet K., Ryckaert W.R., Pointer M.R., Deconinck G. and Hanselaer P. (2011) ‘Colour appearance rating of familiar real objects’. Color Res Appl. 36:192-200.

Smet K.A.G., Schanda J., Whitehead L. and Luo R.M., (2013) ‘CRI 2012: A proposal for updating the CIE colour rendering index?, Lighting Res. Technol. 2013; 45: 689– 709

TM-30-15 (2015) IES Method for Evaluating Light Source Color Rendition

Valan F. (2011) ‘Linee guida per il Piano colore della città di Milano: proposta per un Piano Attuativo d’Ambito’, in Colore e Colorimetria Vol. VII/A: pp 259-264

Van Santen C. (2006) ‘Light Zone City: Light Planning in the Urban Context’. Birkhäuser Publishers for Architecture

Xiaomin D. and Yilin K. (2009) ‘Urban Colourscape Planning. A Colour Study of the Architecture of Karlskrona’, Thesys of Blekinge Tekniska Högskola for the Master’s degree of European Spatial Planning and Regional Development

Yin, E. (2003) Urban ‘Colourscape Planning and Design’, World Architecture Press

Downloads

Published

2017-09-01

Issue

Section

Papers

How to Cite

“Exploring the relationship between LEDs Lighting, Urban materials chromaticity and People: measurements, design and evaluation” (2017) Cultura e Scienza del Colore - Color Culture and Science, 8, pp. 65–74. doi:10.23738/ccsj.i82017.07.