Vertical cool tube questions

[rr14]

Hi guys. When you are using cool tubes, how close can you get your light to the plants with a 400 hps or 600 hps? I'm thinking of doing one in a vertical setup. I have a vortex 8" (747 cfm) that I'll probably split to run to 4 of these. Also, is that enough flow?

 

[macster]

Inches

 

[rr14]

nice... I was thinking a foot or so...

 

[Berry_Coughin']

yes inches...... that's not a cool tube but a cool sun reflector, and I find the tubes to cool better.........

oh yea, I run a canfan 737 8" HO fan across that sucker... no filter....

 

[okwildfire]

i wouldnt get much past..4 inches for the 400...and six inches for the 600...why?? the light spreads better when its off the weeds a lil...but what do i know huh?

 

[Berry_Coughin']

I don't need the light to spread in my nuclear box there it's a light bouncing extravaganza in there!!!!

 

[rr14]

I'm thinking of going vertical so they'll be surrounded. I just don't want to cook stuff.