Grow Closet Info Please!!!

I have built a grow room that is 6ftx4ftx2ft with a drip system. I have already installed my fan and Carbon Filter setup. I am going to use a 400w hps/mh setup. I am wondering which is the best type of reflector to get(Cooltube, air coolable, or inline)? I am buying off of ebay and these are the options for reflectors.

Here is a list of specifics on the setup to give you a better Idea of what I need:

Fan: 90cfm/.5 sones
Carbon Filter: Homemade
4in holes on both sides of the bottom for air intake(inserted a 6in long 4in PVC into each hole to keep light from escaping)

I am thinking of using Reflectix, do you think 6ftx4ftx2ft grow closet is too small for reflectix or should I use reg. Mylar or Panda Film?

Also, Should the 90cfm fan keep a 6ftx4ftx2ft box cool enough?

Thanks
McNuggett

Here is picture of fan

the 90cfm fan should work for your grow as long as it is always on when your lights are on. remember with the carbon scrubber that it will lower your cfm rating of your fan, if it's constantly getting over 90 in your closet you might want the exhuast to be blowing a little faster, maybe around 120-150 cfm. Is your light footprint 2x4'? Is the closet 6' tall? If so your lights will work perfectly with a basic reflector unit, just be sure and exhaust the air out the top and have a small oscillating fan in to blow the air around inside. keep me posted.
& good luck!

You can check out my wardrobe in my sig. I used the Reflectix - no problems.

I used Super Sun 2 Reflector hood. I think you will need more fan power.

Super Sun 2 reflector - Galaxy ballast grow light system from Growco Indoor Garden Supply