Another grow box questions

Setting up another grow box frame will have a push fit door and will be built from 2x1 baton and lined with hard board, box will be 4 foot long just over 2 wide and 5.1/2 foot high. I have 2 bathroom extraction fans and 2 shower extraction fans and set up will house 1x400-600watt hids and 8 fittings for cfl, access to grow space will be from a door in the side which will also have passive air intakes or a gap at the bottom.
Extraction how does this sound, have the 2 bathroom extraction fans at the far end from the door (which will have air intakes) pushing air out and one shower fan taking heat from the hids out and the other shower fan just to circlate air from top to bottom.
Or would I be better off by mounting all the fans in the middle behind the hids and have air intakes at each end of the box?.

 

Also with the shower fans they have ducting so have the option of blowing cool air across hids light and out from the other extraction fan.

 

Hey Rock hows it goin'! RU sure you'll need that much light in 2'X4' space? Seems like 1-600 would be more than enough:>)

 

Not so bad thanks still ducking and diving and getting away with it all.
We all know your right natural but just want to break my 50 watts per square foot rule and fancy bit extra on yield.
Was not gonna use cfl's fittings just there handy from time to time and for a new build easy to install.

 

Build
Hardboard 3mm 10x1220x660 sheets £25
10x2.4m 50x25mm sawn baton £17
Fixings around £8
Total £50

Fans
2xbathroom extraction fans £22
2xshower extraction fans £53
Total £75 hmm good job I got em for nothing.

Lighting
Lumatek ballast 600 watt £140
Son t plus bulb osram £20
Reflector £18
Cfl x 8 fixtures and cable £10 Total £188

Grand total £313 uk.
Of which just over £60 goes to are beloved taxman aww bless.

 

Can't wait for the journal on this grow cab!>)

 

Yup sure everybody here would love to see how I grow chillie peppers all year round very simular grow method to cannabis you know lol.