Oh danlboy, oh Danlboy...
DAMN!!!
I wish I had caught this thread sooner then this! I'll be the first to tell you...(really wondering why nobody else had said anything sooner then this...really!)

I'll let you in on a little secret. Alot of these so called "Turn-Key" systems are a load of shit!
Wait a second! Forget that!...
It's better to say, in this hobby or profession(...ur call), it takes alot of hard work, time, and money in the end to have a harvest. Keep in mind though the money does come back...hobby or profession.

All the gear...(equipment), and top genetics arn't gonna do you shit though, unless you have the know-how! I'm guessing this forum isn't to old...i dunno.

Ok look...
TRying to stick a 600w, or even a 400w MH/HPS...(ur call again), through a house vacuumed sized fan, in this size of a box, .....will not be stealthy, unless you happen to re-arange the room that this box will be placed in.
Did I mention the fire hazard that these little cuties can cause if a fan dies out on ya!?
I am telling you from experiance...
i've built loads!!! of closet/cabinet/room size gardens over the years to suit my needs, and afew others, including helping them build rooms....( i was a manager for a hydrostore....ya meet alot people:rasta: ). I was also furtunite enough be able to use many diffrent type's of growing and equipment.
It will never come that easy...for the most part.
Some of those systems if powerd by smaller lights and a fade control for the ventilation system would be AWSOME!
However not the one you bought, IMO.
Hands down, would it work? Would you be able to pull an optimum harvest every, roughly 2.5 months with a 600w in their? I dunno...I have some HUGH conserne(sp?) about that.
Did I mention stealthy...lol.
If you can get your money back then do yourself a favor....