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Re:Some cities are taking another look at LED lighting after... by fpoling on Sunday September 25, 2016 @12:15PM (#12575917)
While that may improve sleep, it may also made driving less safe. With blue light it is easy for eyes to focus. In fact there is a theory that significant increase in myopia during the last 100 years is caused by eye work under artificial light without blue color, like from ordinary light bulb...

Edit: I should have written "without blue light in spectrum eyes work harder". Basically any deviation from the spectrum of Sun have cosequences for eyes performance long term

http://www.eyedolatryblog.com/2014/02/myopia-may-be-reversib...

Re:Some cities are taking another look at LED lighting after... by honkhonkpants on Sunday September 25, 2016 @12:30PM (#12575988)
First time I've heard that it is easy to focus blue light.

https://www.google.com/search?q=is+it+hard+to+focus+on+blue+...

Re:Some cities are taking another look at LED lighting after... by fpoling on Sunday September 25, 2016 @01:39PM (#12576318)
I should wrote about focusing in light without blue component, not focusing under blue light.

http://www.eyedolatryblog.com/2014/02/myopia-may-be-reversib...

Re:Some cities are taking another look at LED lighting after... by witty_username on Sunday September 25, 2016 @12:54PM (#12576107)
Apart from psychological effects, there is no reason why blue light should be easier to focus (the change in refractive index for different wavelengths is marginal).