OK i been looking into a 400w hps for this size drobe, i found a "growroom calculator" in google cant name the place but its top of the list :P
Grow area
3.5 width x 1.5 depth x 5.5 height, calc works in feet
= 5.25 square feet floorspace
28.87 cubic feet or 0.81 cubic metres
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this gives 83w psf and 10095 lumens psf, it then goes on to tell you the minimum inline fan capacity to exchange air every 3 minutes which in this case needing an exchange of 17 m3/h or 34 m3/h with carbon filter an ducting, going by that you would only need a cheap 4" inline fan(Up to 137 m3/h ) for extraction, tbh going by the calc i'm a little confused as to wether i'll actually need a cooltube an 6" inline fan to do the job. (don't know how accurate the calc is)
I do have a 4" inline fan already and the possability I could borrow a 400w hps with normal reflector off a friend to test if needs be, but another opinion by someone to confirm either way would be great in the mean time.
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