Plans/Ideas for a 75gal closed canopy?

still looking at some input on fans and # of them. Info on 3 sizes of fans are at the bottom of page 2
 
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Still looking at some input on fans and # of them. Info on 3 sizes of fans are at the bottom of page 2
 
here is my opinion if i were to be building the canopy like yours with that lighting. here is a basic layout i think it would be good mayb over kill not sure haha. i would go with the fans with the most cfm preferably and since you said closed canopy i assume that it will be completely enclosed so no opening at all in the back. i think those big ones on page two will be pretty loud i think they are around 60dBa. you could possibly go with these as an option decent cfm around 167 and only 37 dBa http://www.newegg.com/Product/Product.aspx?Item=N82E16835146003&name=Case-Fans. i was thinking about using it for one of my LED builds in the near future.
you can have the fans on the back push air in and the ones on the top push it out.
hope this helps
View attachment 7728
and if that one is over kill you can do 3 on top and 3 on back
View attachment 7729
 
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