5-10 plants is how I'd use that space, with a really short veg time. You'll have to finish around 3ft or shorter, which shouldn't be too hard. | + + + + + | | + + + + + | Keep in mind that 1200W over 11sqft gives you 109W/sqft which imo is overkill. Two 400W lamps would give you 73W/sqft which is still overkill, especially for plants that will be under 3 feet. One of those 600W lamps would put you at 55W/sqft which is pretty damn good lighting. I've always recommended that people aim for a canopy coverage of between 40-60W/sqft.