hello. this is my first post. i actually copied this post from another forum, i just wanted more input. i've been designing this box and reading up on grow box designs for a couple of weeks now. im looking for approval on it. im going for security and stealth. security first though. i want no light coming out of the box. these are some of the items that i was planning on putting into the box... http://htgsupply.com/viewproduct.asp?productID=48137 - CoolTube 6" Reflector http://htgsupply.com/viewproduct.asp?productID=45667 - Digital Electronic 400 watt HPS Ballast http://htgsupply.com/viewproduct.asp?productID=52557 - GrowBright 4" Inline Fan http://www.4hydroponics.com/grow_room/ElfFilter.asp - Elf Charcoal Filter are these good products? this is the grow box design... the picture has two different front views of the box, one has just the dimensions and the other has the above items in it. the box will be 3' wide x 2' deep and 6' high, but the growing area inside will be 2' wide by 2' deep and 6' high. im going to have a 400 watt HPS in there. that comes out to 100 watts per sq ft. is this to much light? the ventilation areas will be on the side of the box, passive air intake at the bottom and a fan sucking air through the cool tube, then pushing air through the filter which is in the top ventilation area which will have a large vent to outside the box. will this be enough ventilation for the box? the cool tube has 6" mounts, could i use 4" tubing without problems? the bottom ventilation area will have 2 different sets of 4" piping that will wined around so that light cannot escape the box. there will be vents over the holes on the outside of the box. is this enough for passive intake with the above ventilation area? will common vents restrict air from flowing in? what do you all think? will it work? where will my biggest problems be? thanks.