There's more information about the blue hazards in this report from Cree (LED manufacturer) http://www.cree.com/~/media/Files/Cree/LED%20Components%20and%20Mod

There's more information about the blue hazards in this report from Cree (LED manufacturer) http://www.cree.com/~/media/Files/Cree/LED%20Components%20and%20Modules/XLamp/XLamp%20Application%20Notes/XLamp_EyeSafety.pdf http://www.cree.com/~/media/Files/Cree/LED%20Components%20an...