Detail publikace

Experimental LED Luminaire for Investigation of Non-visual Effect of Light to Human Circadian System

PARMA M. BAXANT P. ŠKODA J.

Originální název

Experimental LED Luminaire for Investigation of Non-visual Effect of Light to Human Circadian System

Typ

článek ve sborníku ve WoS nebo Scopus

Jazyk

angličtina

Originální abstrakt

Relationship among light and human health, disease, and wellness is one of the most researched areas in lighting technology of the decade. The progressing scientific findings in the fields of chronobiology, photobiology, and scotobiology are necessary for composing of entire image how artificial light directly impacts the human circadian system. It is known that non-visual photoreceptors - intrinsically photosensitive Retinal Ganglion Cells - ipRGCs, which are co-responsible for synchronization of circadian rhythm, require blue spectral components in the light with a maximum spectral sensitivity around 460 – 480 nm, but also receive input from visual photoreceptors. Researchers have identified intensity, spectrum, duration/pattern, and timing of light exposure as important variables that control the responsiveness of the non-visual system. We therefore developed modular LED luminaire, which is able to control all of these variables and allowing dynamic change of the spectral power distribution of luminous flux with possibility of colour temperature changing in the range 2400 K - 10 000 K (Ra >90, uv < 0.0005) and also possibility to set any hue in the colour gamut given by fixture construction. Circadian system response was verified by mathematical model developed by Rea et al. Circadian stimulus (CS%) was calculated for range of CCT: 2400 K - 10 000K and compared to commercial artificial light sources commonly used in residential lighting as well as standard CIE illuminants together with two types of sky ("Clear" and "Cloudy").

Klíčová slova

Circadian stimulus, correlated colour temperature (CCT), human circadian system, light emitting diode (LED), spectral power distribution (SPD).

Autoři

PARMA M.; BAXANT P.; ŠKODA J.

Vydáno

15. 9. 2017

Nakladatel

Matej B. Kobav, University of Ljubljana, Slovenia

Místo

Ljubljana

ISBN

978-961-93733-4-7

Kniha

PROCEEDINGS of the Lux Europa 2017 Conference Lighting for modern society

Edice

first

Číslo edice

1.

Strany od

658

Strany do

662

Strany počet

5

BibTex

@inproceedings{BUT139891,
  author="Mikuláš {Parma} and Petr {Baxant} and Jan {Škoda}",
  title="Experimental LED Luminaire for Investigation
of Non-visual Effect of Light to Human
Circadian System",
  booktitle="PROCEEDINGS of the Lux Europa 2017 Conference
Lighting for modern society",
  year="2017",
  series="first",
  number="1.",
  pages="658--662",
  publisher="Matej B. Kobav, University of Ljubljana, Slovenia",
  address="Ljubljana",
  isbn="978-961-93733-4-7"
}