600w HPS Overkill For Cabinet Grow???

I've often wondered about using home brewing for added co2.

My grow cab is right next to my brewing station just for this reason. I ferment in a cabinet to keep the light out. The air intake for my grow cab is piped from inside my brewing cabinet. That's part of the reason you can't smell the weed. The yeasty fermenting smell of beer is numero uno stink in my garage. Smells like drunk heaven to me.

For shits and grins though Cali, lets say I do want to pack all this madness into one cabinet. Run the bottom as a veg chamber with the T5's and the top as a SCROG HPS flower chamber. Vent to the cool tube pulling through the floor of the upper cab so it's venting the hot air off the T5 as well. Can put a narrow vent opposite of the cool tude intake so it pulls fresh cool air across the top of the T5 and then up through the tube and outside. The T5 fixture takes up the entire inside footprint of the cabinet. So the path of least resistance for air would be through the vent and across the top of the T5's and not up through it. Then I can put the 4" duct fan inside the lower cab, through the side wall and duct it up to the upper. Then have the 6" fan pushing a carbon filter venting the upper cab into my garage. Then a passive vent in the bottom cab to provide fresh air intake. Would be cramped..... but hell, I am not growing to sell. Just need enough to keep me and the wife happy.