Water cooling of the TI bars is fairly easy and straight forward. And it is a plus in many ways since the design spreads the lights out, not a block design like most hi-power LED lights. I've actually been looking at long (4') aluminum heat sinks, plus fans for a DIY light design (800-1200w over 4'x4') and honestly I'm thinking about using water cooling instead. It might even be more energy efficent then running so many fans.
I totally agree, much better than spilling it back into the grow space.

It's funny you should mention the air output from the TI 600 Pro-Bloom's. Just last night we filled the new aero/fog tray will rooted cuttings, and sat watching the lights move back and forth accross the tray on the light rail. The output blows down slightly towards the plantlets causing them to be blown around lightly. We where just saying last night how nice it was, no need for a oscillatting fan on the plants! See, one person's fault is another's plus.
This is so true!

M.P.