Related Experiment Video
Updated: Nov 4, 2025

05:50
Measuring Light-Switching Behavior Using an Occupancy and Light Data Logger
Published on: January 16, 2020
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luox: validated reference open-access and open-source web platform for calculating and sharing physiologically
Manuel Spitschan1,2,3,4,5,6,7, James Mead8, Chris Roos8
1Department of Experimental Psychology, University of Oxford, Oxford, UK.
Wellcome Open Research
|November 16, 2022
Summary
A new open-source platform, luox, helps researchers calculate light
Area of Science:
- Vision science
- Chronobiology
- Lighting research
Background:
- Light profoundly impacts human physiology and behavior, influencing circadian rhythms and melatonin production.
- Non-visual responses to light are crucial for understanding circadian photoentrainment and designing human-centric lighting.
- The International Commission on Illumination (CIE) standardized spectral sensitivities for non-visual light effects in 2018.
Purpose of the Study:
- Introduce luox, a novel, user-friendly, open-access, and open-source platform.
- Enable researchers to calculate light-related quantities from spectral measurements.
- Facilitate research in vision science, lighting, chronobiology, and sleep research.
Main Methods:
- Developed a modular and extendable codebase for calculating spectrum-derived quantities.
- Implemented calculations for CIE quantities and indices.
- Ensured platform usability for researchers in adjacent fields.
Main Results:
- The luox platform provides a lean and user-friendly interface for light data analysis.
- Calculations of CIE quantities and indices have been validated and endorsed by the CIE.
- The open-source nature allows for modularity and future extensions.
Conclusions:
- Luox empowers researchers by simplifying the conversion of spectral measurements into reportable quantities.
- The platform supports physiologically inspired architectural lighting design and advances non-visual light research.
- The validated and endorsed calculations ensure reliable data for scientific applications.
Keywords:
CIEEDIEDLInternational Commission on Illuminationalpha-opic irradiancealpha-opic radiancechronobiologyconesenvironmental psychologyequivalent daylight illuminanceequivalent daylight luminanceipRGCslightmelanopsinnon-visual effects of lightopen accessopen sourcerodssleep researchspectrumweb platformRelated Concept Videos
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