Calming Effects of Blue Lights.

http://www.yomiuri.co.jp/dy/national/20081211TDY02313.htm

I thought this article was very interesting. If blue lights do indeed decrease the amount of crimes where they are installed then it could make a huge impact on crime and suicide rates in Japan. However, without long term studies of the effects of blue lighting it will be impossible to tell if the blue lights are just making people go elsewhere or if they actually do calm the population.