Tabular on 11 July 2013
Not sure if this was posted yet but a lot of people commenting don't seem to realize that the developer can choose to turn the light off if it's not needed. Sony just didn't want to allow you to turn it off for games that do need it.
Read this post with the UPDATE.
http://www.eurogamer.net/articles/2013-07-08-the-dualshock-4s-bright-blue-light-cant-be-turned-off
