Thanks all,

I've decided to go with the Radiant Air Cooled Reflector with a Quantum Ballast and a 600w HPS in the DR120. I like 319's idea because if this all goes well maybe I'll setup a Veg tent and a Flowering tent.

My next step is to calculate the cfm I'll need to cool this setup, both the light and grow chamber, I've found some calculations so I'll need to sit down and figure this out. At the moment I'm looking at either a Vortex or Can fan, are these good brands? (Side note my first instinct is to use 8" ducting any pros or cons vs 6"?)

Cheers