I am going to build a custom grow box. It will be a 5ft wide by 2.5ft long by 6.5ft high split down the center creating two 2.5ft by 2.5ft boxes. One will be for cloning/veg and the other for flowering. I know to use the mh for veg and hps for flowering. Would the an 400w metal halide be to much for the veg room to sustain the mother plant and clones? I am also having problems figuring out the ventilation. Do i use the 435cfm fan with filter to pull air out and leave a hole open to let air come in? I know you said you dont have a tent set up. Is there someone that you know that might be able to mentor me along in the process that has a similiar set up? thanks