A couple more things...

I bought the cabinet (30" x 19" x 6') , duct fan, reflectix at home depot.

In hind sight - I wish I would have bought a deeper cabinet.

I also made some 1" holes at in the back behind the bubbler to let air in.

A couple questions
1) Do you think I could put my 400 watt hps in there without adding additional cooling?
2) Do you think the existing light will be good enough at 20K lumens?

Thanks!

-Kicksome