I like it. really nice.
An Idea for you to consider... Putting a couple small exhaust fans to pull the warm air up though the light board. so your main exhaust can carry the air away.
Just a thought. Great job! I may copy some of this for my next addition of lights.
My thoughts exactly! GL with the grow! check out my thread. Could def use some advice.i have 2 computer fans that i am going to mount on it for heat control