Stircrazy and other lighting gurus

[marie]

At the moment I am having good success with a hamilton 250w hqi hood on my 175g bowfront running 10k xm de bulbs

My question first off is it possible to go with 250w mogul based xm bulb and lumenmax reflectors using the hqi ballasts I already have.

Second question, would I get enough increase in par to be worth the hassle of changing everything around

Third question, (providing the answer to the other 2 is yes) how much work would it be to change the cords (going from the ballast to the hamilton hood) over to a mogul socket. Would I need an electrician or just someone who thinks they know what they are doing?