The blue LEDs in the picture you linked to, indicate that the servers are running smoothly. [1] It's possible that some servers were faulty at the time the pict

The blue LEDs in the picture you linked to, indicate that the servers are running smoothly. [1] It's possible that some servers were faulty at the time the picture was taken. More likely, it's to make the image look perfect. [1] http://www.google.com/about/datacenters/gallery/#/all/12 http://www.google.com/about/datacenters/gallery/#/all/12