You need a bigger garden compartment, BID. 400 was strong but managable in it, but that bodacious 600 will be fierce in there. You will certainly not be a happy camper with that big bulb dangling buck nekkid down the middle. You could grow 4 beauties with a bare 250 on a 2 X 3 footprint, but you have a man-sized bulb in the mail. To utilize all of it, bare vert 8 bushes in a 4 X 4' box. You're basically broke, so build it of re-cycled stuff as best you can.
Right!
What you will do is keep it high enough to not scorch your little SOG, and grow frosty nugs but not as many as could be raised in a 40" (sq meter) SOG. If I was your neighbor out there in E.Podunk, I'd have already given you one of my unused mag 250s for a vert. I'm short one or two reflectors needed for a big SOG, so a vert grow is more appealing. When I buy an eballast 600 set, the $200 cost means the cordset, bulb, and reflector are basically free. I've difficulty coming up off of $40 for a hood by itself, but if I must?
I have a doublewide 40 X 80" with two 600s; a little tight for vert but double width helps.
Every engineer needs two things: service expectation and resource availabily commitment.
Planning & accomplishing any grow is engineering. Green thumbs are good, but avoiding hammered thumb is better. Winning a mega lottery, then moving next to a dispensery is best.
PS, you don't need a reflector for the 600 on a 2 X 3' sog if you can mount the bulb sideways in the middle at the right height: plenty of light to play with.
