Excellent
**pulls up chair**
I have one more soil grow to complete so I will have mothers, then I'm switching to bubble buckets like you but on a smaller scale; 2 buckets one 600W.
I just installed a cool tube and was disappointed because it seems to steal light vs. the old batwing I had. At first I used aluminium dryer duct then I found
this. It is cheap, made of PVC so it can take the heat, and allows some of the light that is lost in the duct to come through. I think it will help you more than me because you have so many lights and a lot of ducting running inside the grow area.
What is the typical height of your plants at harvest? I'm kinda worried about it when I make the switch to hydro because if they get taller than 3 1/2 feet the tops will be too close to the light. You think I can keep 'em under 4 ft--not counting bucket height--with a 6 week veg cycle? How long do you veg before flowering?