Large grow tent owners

Thinking about ordering a large grow tent around the size of 6' x 9'. I plan on using a 1000w dimmable digital ballast so that I may use lower wattage at earlier stages of growth and the maximum during times of flowering.

I just want to know what kind of success anyone has experienced with tent. Do they limit yeilds? Does it get considerable hot using 1000w?

Let me know how i can maximize yeilds in a space such as this.

And i will also have a mini tent 2'x2'x5' for clones and mothers

im using two 8x4s each with 1000 hps and some supplemental lights, definitely needs to be aircooled. it may take more watts if its packed with plants. it can be aggravating when your limited to a height that is shorter than the ceiling, but thats it.