16th September 2019 – Barcelona, Spain.

An article presented in the 29th International Commission on illumination (CIE) Conference, Washington D.C., USA, entitled “testing the use of spectrally tunable lighting systems to improve comfort, alertness and sleep quality in indoor working environments” marks a substantial advance in experimental human-centric lighting science and technology. In their paper, researchers describe experimental results of spectrally tuneable lighting technology in offices in terms of their effects via the classical visual pathway (e.g. chromaticity or brightness) and spectral variations in light elicit non-visual effects, including on emotion and cognition, via a distinct neural pathway, and it is important for health and wellbeing to take these into account.



The authors describe the methodology of this experiment designed to test whether dynamic sculpting of the light spectra in indoor environments, either to mimic natural daylight changes or achieve particular levels of non-visual vs. visual stimulation, may elicit different biological and behavioral effects. Subjective and objective measurements were used to assess the behavioral responses resulting from exposure to custom-made, dynamically changing light spectra sequences that are produced by a spectrally tunable lighting system with VEGA07 modules, and to compare these with responses to a traditional fluorescent lighting system.

The article authors are Aleix Llenas, of the Catalonia Institute for Energy Research (IREC) and LEDMOTIVE Technologies, Spain, and Josep Carreras, CTO of LEDMOTIVE Technologies. Anya Hurlbert and G. Gaurav from Newcastle University. F. Lam, R. Manudhane and J. Giddings from ARUP.  This investigation has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 766792

For More information:

Llenas A, Hurlbert A, Lam F, Manudhane R, Gaurav G, Giddings J, Carreras  J . Testing the use of spectrally tunable lighting systems to improve comfort, alertness and sleep quality in indoor working environments. Conference proceeding by Commission Internationale de L’Eclairage, 14 June 2019, Washington D.C., USA. DOI 10.25039/x46.2019.PP29