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--></style></head><body lang=en-DE link="#467886" vlink="#96607D" style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal><span lang=EN-US style='font-family:"Arial",sans-serif;mso-ligatures:none'><img width=114 height=130 style='width:1.1875in;height:1.3541in' id="Picture_x0020_1" src="cid:image001.png@01DAC965.7C803DB0"></span><span lang=EN-US style='font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><b><span lang=EN-US>Introducing LightLogR, an open-source R package for the analysis of personal light exposure data</span></b><span lang=EN-US><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Light exposure significantly influences many aspects of human physiology and behavior, including the entrainment of circadian rhythms, the production of melatonin in the evening and at night, and the development of myopia. Wearable light loggers enable the measurement and estimation of light exposure received by a person, but the resulting time series need to be analyzed to turn data into insights for research and clinical practice.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Introducing <b>LightLogR</b>, an open-source R package for analyzing personal light exposure data.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>LightLogR implements the following features:<o:p></o:p></span></p><ul style='margin-top:0cm' type=disc><li class=MsoNormal style='mso-list:l0 level1 lfo3'><span lang=EN-US>Generation of data and metadata files<o:p></o:p></span></li><li class=MsoNormal style='mso-list:l0 level1 lfo3'><span lang=EN-US>Conversion of common file formats<o:p></o:p></span></li><li class=MsoNormal style='mso-list:l0 level1 lfo3'><span lang=EN-US>Validation of light logging data<o:p></o:p></span></li><li class=MsoNormal style='mso-list:l0 level1 lfo3'><span lang=EN-US>Verification of crucial metadata<o:p></o:p></span></li><li class=MsoNormal style='mso-list:l0 level1 lfo3'><span lang=EN-US>Calculation of common parameters<o:p></o:p></span></li><li class=MsoNormal style='mso-list:l0 level1 lfo3'><span lang=EN-US>Semi-automated analysis and visualization (both command-line and GUI-based)<o:p></o:p></span></li><li class=MsoNormal style='mso-list:l0 level1 lfo3'><span lang=EN-US>Integration of data into a unified database for cross-study analyses<o:p></o:p></span></li></ul><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>LightLogR is licensed under the </span><a href="https://github.com/tscnlab/LightLogR#GPL-3.0-1-ov-file"><span lang=EN-US>GPL-3.0 license</span></a><span lang=EN-US>. The codebase is available from GitHub: </span><a href="https://github.com/tscnlab/LightLogR"><span lang=EN-US>https://github.com/tscnlab/LightLogR </span></a><span lang=EN-US><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Current version: 0.3.7 ("Astronomical dawn")<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Documentation: </span><a href="https://tscnlab.github.io/LightLogR/"><span lang=EN-US>https://tscnlab.github.io/LightLogR/</span></a><span lang=EN-US><o:p></o:p></span></p><p class=MsoNormal><span lang=DE>Code: </span><a href="https://github.com/tscnlab/LightLogR"><span lang=DE>https://github.com/tscnlab/LightLogR</span></a><span lang=DE><o:p></o:p></span></p><p class=MsoNormal><span lang=DE><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>LightLogR is developed by the </span><a href="https://www.tscnlab.org"><span lang=EN-US>Translational Sensory & Circadian Neuroscience Unit (MPS/TUM/TUMCREATE)</span></a><span lang=EN-US>, a joint group based at the </span><a href="https://www.tum.de/en/"><span lang=EN-US>Technical University of Munich</span></a><span lang=EN-US>, </span><a href="https://www.tum-create.edu.sg/"><span lang=EN-US>TUMCREATE</span></a><span lang=EN-US>, the </span><a href="https://www.mpg.de/152075/biological-cybernetics"><span lang=EN-US>Max Planck Institute for Biological Cybernetics</span></a><span lang=EN-US>.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><b><span lang=EN-US>Community involvement</span></b><span lang=EN-US><o:p></o:p></span></p><p class=MsoNormal><i><span lang=EN-US>Interested in contributing – ideas, feedback, new feature requests, or code?<o:p></o:p></span></i></p><p class=MsoNormal><span lang=EN-US>Please get in touch via email (<a href="mailto:johannes.zauner@tum.de">johannes.zauner@tum.de</a>) and complete our </span><a href="https://de.surveymonkey.com/r/3LL9NKQ"><span lang=EN-US>LightLogR Community Development Survey</span></a><span lang=EN-US> (and win a prize!).<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><b><span lang=EN-US>Funding</span></b><span lang=EN-US><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>LightLogR is developed within the </span><a href="https://www.euramet.org"><span lang=EN-US>EURAMET</span></a><span lang=EN-US>-funded project </span><a href="https://www.melidos.eu"><span lang=EN-US>MeLiDos</span></a><span lang=EN-US> project. To learn more about MeLiDos, read our </span><a href="https://doi.org/10.1016/j.measurement.2024.114909"><span lang=EN-US>recent overview article</span></a><span lang=EN-US> or visit the MeLiDos website at </span><a href="https://melidos.eu/"><span lang=EN-US>https://melidos.eu/</span></a><span lang=EN-US>. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Arial",sans-serif'><o:p> </o:p></span></p><div><p class=MsoNormal><span style='font-size:10.5pt;font-family:"Arial",sans-serif;color:#156082;mso-ligatures:none;mso-fareast-language:EN-GB'>Manuel Spitschan PhD<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#156082;mso-ligatures:none;mso-fareast-language:EN-GB'> </span><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#156082;mso-ligatures:none;mso-fareast-language:EN-GB'><o:p></o:p></span></p><p class=MsoNormal><b><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#156082;mso-ligatures:none;mso-fareast-language:EN-GB'>Assistant Professor </span></b><b><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#156082;mso-ligatures:none;mso-fareast-language:EN-GB'>for Chronobiology and Health</span></b><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#156082;mso-ligatures:none;mso-fareast-language:EN-GB'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#156082;mso-ligatures:none;mso-fareast-language:EN-GB'>Technical University of Munich<br>TUM </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#156082;mso-ligatures:none;mso-fareast-language:EN-GB'>School of Medicine and Health</span><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#156082;mso-ligatures:none;mso-fareast-language:EN-GB'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#156082;mso-ligatures:none;mso-fareast-language:EN-GB'>TUM-IAS Fellow<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#156082;mso-ligatures:none;mso-fareast-language:EN-GB'>Telepho</span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#156082;mso-ligatures:none;mso-fareast-language:EN-GB'>ne: +49 (89) 289 24544</span><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#156082;mso-ligatures:none;mso-fareast-language:EN-GB'><o:p></o:p></span></p><p class=MsoNormal><a href="mailto:manuel.spitschan@tum.de" title="mailto:manuel.spitschan@tum.de"><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#156082;mso-ligatures:none;mso-fareast-language:EN-GB'>manuel.spitschan@tum.de</span></a><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#156082;mso-ligatures:none;mso-fareast-language:EN-GB'><o:p></o:p></span></p><p class=MsoNormal><a href="https://www.sg.tum.de/en/chronobiology/home/" title="https://www.sg.tum.de/en/chronobiology/home/"><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#156082;mso-ligatures:none;mso-fareast-language:EN-GB'>https://www.sg.tum.de/en/chronobiology/home/</span></a><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#156082;mso-ligatures:none;mso-fareast-language:EN-GB'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#156082;mso-ligatures:none;mso-fareast-language:EN-GB'><o:p> </o:p></span></p><p class=MsoNormal><b><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#156082;mso-ligatures:none;mso-fareast-language:EN-GB'>TUMCREATE Principal Investigator<o:p></o:p></span></b></p><p class=MsoNormal><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#156082;mso-ligatures:none;mso-fareast-language:EN-GB'>TUMCREATE Singapore<o:p></o:p></span></p><p class=MsoNormal><a href="https://www.tum-create.edu.sg/"><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#156082;mso-ligatures:none;mso-fareast-language:EN-GB'>https://www.tum-create.edu.sg/</span></a><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#156082;mso-ligatures:none;mso-fareast-language:EN-GB'> <span lang=EN-US><o:p></o:p></span></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#156082;mso-ligatures:none;mso-fareast-language:EN-GB'> <o:p></o:p></span></p><p class=MsoNormal><b><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#156082;mso-ligatures:none;mso-fareast-language:EN-GB'>Max Planck </span></b><b><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#156082;mso-ligatures:none;mso-fareast-language:EN-GB'>Research Group Leader</span></b><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#156082;mso-ligatures:none;mso-fareast-language:EN-GB'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#156082;mso-ligatures:none;mso-fareast-language:EN-GB'>Max Planck Institute for Biological Cybernetics<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#156082;mso-ligatures:none;mso-fareast-language:EN-GB'>Max Planck Research Group <i>Translational Sensory & Circadian Neuroscience</i><o:p></o:p></span></p><p class=MsoNormal><a href="mailto:manuel.spitschan@tuebingen.mpg.de" title="mailto:manuel.spitschan@tuebingen.mpg.de"><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#156082;mso-ligatures:none;mso-fareast-language:EN-GB'>manuel.spitschan@tuebingen.mpg.de</span></a><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#156082;mso-ligatures:none;mso-fareast-language:EN-GB'><o:p></o:p></span></p><p class=MsoNormal><a href="https://www.kyb.tuebingen.mpg.de/614159/translational-sensory-and-circadian-neuroscience" title="https://www.kyb.tuebingen.mpg.de/614159/translational-sensory-and-circadian-neuroscience"><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#156082;mso-ligatures:none;mso-fareast-language:EN-GB'>https://www.kyb.tuebingen.mpg.de/614159/translational-sensory-and-circadian-neuroscience</span></a><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#156082;mso-ligatures:none;mso-fareast-language:EN-GB'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#156082;mso-ligatures:none;mso-fareast-language:EN-GB'> <o:p></o:p></span></p><p class=MsoNormal style='margin-left:36.0pt;text-indent:-36.0pt'><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#156082;mso-ligatures:none;mso-fareast-language:EN-GB'>Website: </span><a href="https://tscnlab.org/"><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#156082;mso-ligatures:none;mso-fareast-language:EN-GB'>https://tscnlab.org/</span></a><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#156082;mso-ligatures:none;mso-fareast-language:EN-GB'><o:p></o:p></span></p><p class=MsoNormal style='margin-left:36.0pt;text-indent:-36.0pt'><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#156082;mso-ligatures:none;mso-fareast-language:EN-GB'>Twitter: </span><a href="https://twitter.com/mspitschan" title="https://twitter.com/mspitschan"><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#156082;mso-ligatures:none;mso-fareast-language:EN-GB'>@mspitschan</span></a><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#156082;mso-ligatures:none;mso-fareast-language:EN-GB'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#156082;mso-ligatures:none;mso-fareast-language:EN-GB'>Google Scholar: </span><a href="https://scholar.google.com/citations?user=BXbgAZIAAAAJ" title="https://scholar.google.com/citations?user=BXbgAZIAAAAJ"><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#156082;mso-ligatures:none;mso-fareast-language:EN-GB'>https://scholar.google.com/citations?user=BXbgAZIAAAAJ</span></a><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#156082;mso-ligatures:none;mso-fareast-language:EN-GB'><o:p></o:p></span></p><p class=MsoNormal><span 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