Thanks!, that cleared a lot up!

If I choose the HID system I would definitely need two holes in my cupboard, one for fresh air and one for warm/old air + some fans and ducts to move the air away- I??d rather not have to do that if there is another way.

The other option I have is to go with two 200w Red Envirolites, this way I can have one at the top and one at the bottom/side to provide light to the lower section of the plant. For ventilation I could use a 9? fan to move the air around the cupboard and good quality ionic air purifier which would hopefully refresh the air and also get rid of any smells, also, opening the door from time to time will air the place out a bit too. Do you think that would be sufficient?, or do I need to make a proper vent system even if I am not using HID??s?

Thanks!