MH question

[Namscam]

Ok right now I have dual 175w but want to go to dual 250w or 400 watts but I want to keep my fixtures...The setup I have comes with quick diconnect. The question is can I just keep everything: mogul socket, fixture, and wires the way it is and just change the ballast and lights..so wut I am saying is that can I just get another like dual 250w with quick dc and jsut connect that to my existing quick dc plug and change the lights to 250w lights ...or would i have to change the mogul sockets and everything???