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Abstract: |
With the increasing attention on circadian effects driven by light, lighting industry has inspired a revolution of photobiological lighting design. Due to diverse evaluation criteria for visual and non-visual systems, models that combine these evaluation parameters are indeed urgent. Thus, an integrated model for mesopic lighting evaluation of circadian effects was proposed. The circadian efficiency function adopted in this study was synthesized by CIE 1931 XYZ 2 deg color matching functions and standard scotopic sensitivity function. Then, the integrated model composed of International Commission on Illumination 1931 xy chromaticity coordinates, scotopic/photopic ratio, and illuminance could be obtained with synthesized circadian efficiency function. The model showed that for light sources with fixed chromaticity coordinates and fixed illuminance, enhancing the circadian effects is equivalent to increasing the scotopic/photopic ratio, which suggests a useful method for practitioners to explore the photobiologically reasonable spectrum for mesopic lighting. Light-emitting diodes spectra optimized by four-component color-mixing method were employed to figure out the property of the integrated model. |
Key words: circadian effects mesopic lighting scotopic/photopic ratio |
DOI:10.11916/j.issn.1005-9113.2019021 |
Clc Number:TU113 |
Fund: |