With the understanding that I only have a few minutes to check for research data:
http://www.ncbi.nlm.nih.gov/pubmed/1801013
http://www.ncbi.nlm.nih.gov/pubmed/21298068 - “cognitive response … to light at levels as low as 40 lux, is blue-shifted”
Sample sizes are dismal, but at least they tried. Thanks for looking this up!
With the understanding that I only have a few minutes to check for research data:
http://www.ncbi.nlm.nih.gov/pubmed/1801013
http://www.ncbi.nlm.nih.gov/pubmed/21298068 - “cognitive response … to light at levels as low as 40 lux, is blue-shifted”
Sample sizes are dismal, but at least they tried. Thanks for looking this up!