https://www.ncbi.nlm.nih.gov/pubmed/30311830 https://www.ncbi.nlm.nih.gov/pubmed/30311830 No real conclusions. It's appears to be a study aimed at making future

https://www.ncbi.nlm.nih.gov/pubmed/30311830 https://www.ncbi.nlm.nih.gov/pubmed/30311830 No real conclusions. It's appears to be a study aimed at making future studies better "The review enables further development of an evaluation method of light pollution in LCA regarding the light-induced impacts on human circadian system." https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2717723/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2717723/ No definitive conclusions: "Additional laboratory-based and field studies are still necessary to better understand some features of the human circadian response to light. We are only beginning to understand how prior exposure to light affects the subsequent response to a light stimulus, and our understanding of how light exposure can affect the period of the human circadian system is also limited (135)." https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2831986/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2831986/ Seems to be a review of other research by a journalist https://www.health.harvard.edu/staying-healthy/blue-light-has-a-dark-side https://www.health.harvard.edu/staying-healthy/blue-light-ha... news article, not science https://www.sleepfoundation.org/articles/how-blue-light-affects-kids-sleep https://www.sleepfoundation.org/articles/how-blue-light-affe... News article, not science I'd go through the rest but it's time for lunch.