Question on HPS light

I am considering ordering from this shop on Ebay that sells HPS and MH lamps. I am wondering if a 1000 watt light would work well in a closet that is 7.5 feet long, 7.5 feet tall, and 1.9 feet wide. Would several oscillating fans work? (low on budget). There are several holes in the doors of the closet as well if that helps. I am wondering if this is possible with all the heat they put out with just the fans and if not, is there a cheap solution? If this is not possible, then, would a 400 watt be better and would it also be sustainable with just a few fans. The link below is for the ballast kit from Ebay which is relatively cheap for most HPS kits I have seen. Will it be difficult to assemble as well? Has anyone ordered through this company? Thank you for any feedback.
1,000 watt HPS Grow Light BALLAST KIT 1000 w 1000w - eBay (item 180037360279 end time Jul-31-08 06:43:02 PDT)

with a 1k watt hps in a that closet you may need an exhaust fan in the cieling. actually id highly recommend exhausting it. as it will probably get hot. if you can locate the ballast outside the room that would help.

Well...I'm using a 2x2 closet space for three plants and I have a 250 hps/mh set up and it's pretty hot. I'm at 90 degrees and 52 hum. So I would use exhaust fans for sure...

A 250 watt HID will illuminate a 2' x 2' garden.
A 400 watt HID will illuminate a 3' x 3' garden.
A 600 watt HID will illuminate a 3.5' x 3.5' garden.
A 1000 watt HID will illuminate a 4' x 4' garden.

good rule of thumb is 30 watts per sq.ft

So, has anyone seen the link and is familiar with the company? I also don't want to spend 110 on something that WILL work but WILL also be hard as hell to assemble. Has anyone purchased one of these lamps?

HTG is in my opinion a good company. I ordered my first ballast from inside sun and it took a crap in 3 weeks. It was supposed to have a 2 year warranty and I could not get the folks at Insidesun to respond. So I ordered one from HTG and he saved the day. Only had 2 days of down time, I would reccomend HTG for this reason, fast and discreet and the prices are competitive.