Assuming you want to use that space as a 3' x 5' vertical scrog
I would buy
28x 2' EB strips 3000 or 3500k $280 au
3x elg-200-c700b $60 au/$180 au
or
4 x elg-200-c1050b $60 but ive only ran my strips at 700ma with them cool to touch after ages.. Others reported no need for any more than ally behind each strip for 1050 but I bet no sink would do the trick (some airflow would be enough),
3x 100k ohm linear potentiometer $2 - local electronics shop
3x 10k ohm resistor to prevent driver going under 10% $1 for 10
$30 of ally angle from hardware
Buy solid core wire to join strips, stranded wire to the drivers and for the dimmer.
2 x 12 strips vertically per 3'Wx2'H and at the top or bottom just position 4 strips horizontally centered. The fixture is made from ally angle, make a square with one support in the middle inline with a mounting point , riveted together so that all of the faces are level with each other (requires cutting/bending then riveting on the sides never the top)
That gives you about 433w @700ma with no heat sinks required, which is 29w/sf (enough IMO in that style/space and considering how close you can get them)
Or go 1050ma and get 676w = 45w/sf