Help with setting up new grow room plz

G'day

Im planning on setting up my first grow room and are needing a little advice please.
I would like to know what the optimum size room for a single 600w lamp system.The cupboard im making will be W 700mm x L 1200mm x H 2000mm,i can change the width and length but height is at max already. Im planning on 6-7 plants in this space of AK47 and white rhino strains. (not at the same time)
I will be using:
[FONT=arial, helvetica][SIZE=-1]1 x 600w SonT lamp
[/SIZE][/FONT][FONT=arial, helvetica][SIZE=-1]1 x Small Shade (900mm x 800mm)[/SIZE][/FONT]
[FONT=arial, helvetica][SIZE=-1]1 x 125mm - 100mm 2 Speed Centrifugal Fan
1 x 125mm x 500mm Activated Carbon Filter
1 x [/SIZE][/FONT][FONT=arial, helvetica][SIZE=-1] 250mm as intake (or there about) [/SIZE][/FONT]

Basically i would like to know if im on the right track or have gone bush with my ideas.Does the space need to be bigger/smaller for amount of plants?Could i fit more plants in?Or need to have less plants?

Cheers and great site by the way
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