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33.2: Invited Paper: FORMULATION AND CHARACTERIZATION OF A TIME‐VARYING LIGHTING REGIME
Author(s) -
Hu Qiuhong,
Ye Hong,
Mou Tongsheng
Publication year - 2021
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1002/sdtp.14438
Subject(s) - luminous flux , photopic vision , circadian rhythm , color rendering index , optics , physics , radiation , color temperature , luminous efficacy , light emitting diode , biological system , environmental science , materials science , light source , biology , nanotechnology , retina , layer (electronics) , neuroscience
A time‐varying lighting regime was formulated based on the action spectrum of the circadian and photopic lights. Using LED panels, the regime was implemented, tested and evaluated in classroom environment. The circadian to photopic ratio C/P was identified as one of the key parameters along with standard photometric and spectrometric quantities. The circadian rhythm of the human body as decomposed into time intervals of the day. By the continuous monitoring of the light output from the LED panels, we obtained instantaneous values and variation in the parameters, such as luminous flux, correlated color temperatures, color rendering indices, luminous efficiency and CS value. Based on these measurement data, we derived the variation of color temperature versus that of black body radiation and that of the color coordinates of the sun light. we also calculated the circadian stimulus curve and found it consistent with the one suggested by Mark Rea et al.