Stupid Light Question

Ok, I used to have 2 light systems. I had to move last year and sadly had to leave one of them behind. I MEANT to grab my 600w but as I was in a hurry I accidentally grabbed my 400w.

So, my current setup I want to run a 600w in. I went and looked up the reflector I have and it says it is compatible with all Sun System ballasts. What I want to know is if you guys think I will be able to just get a new ballast and bulb and keep the reflector I have (link below) :

http://www.horticulturesource.com/sunlight-supply-sun-system-yield-master-ii-reflector-4-air-cooled-optional--p668/

Thanks for any and all help. Oh, and I would be going with a 600W HPS of course.

if the bulbs fits your fine i believe.

Thats kind of what I was thinking as it's the ballast/bulb that actually control energy flow/output if that makes sense. I'll just take it into the shop and see if a 600w bulb will fit. I think it should though. Thanks man.