In the new i12 build, Photon Seekers are missing from the list of powers you can choose. All the rest of the Luminous Blast and Luminous Aura powers are there, but for some reason Photon Seekers aren't.
Just a heads up.
P.S. This was originally posted in the Kheldian section of the coH Forums by Grey_Pilgrim, I just figured I'd repeate it here so it'd be 'officially' reported.