What up folks, I am slowly purchasing different items in order to build my first grow room. On my first grow i plan on using 2 water farm bucket systems for 2 plants. I am building a grow bow that is 4'w x 2'd 6'h, The reason i want to build a grow box is because i am usinng a 6'x 8'utility closet that has no outside ventilation to store it inand also sothe younger members of my family wont see a plant in their hiding place. . i want to include space for lights, venting. etc. in the de sign for the grow box. There is also a hot water heater and central air unit in the closet i thought might affect the plant if the water farm was not inclosed. in looking for less expensive parts for my grow box i have found a bathroom ventilayion fan that i would install in the grow box . Is it to big for this smaller space ? I am also running a 3" flex duct directly from my central air duct system in my home directly into the grow box. Isw this to much air for this space? I found this canp light in my garage and was wondering if it will be suficient to start two small plants for my waterfarm hydro. system? I plan on nrunning a 400w HPS for flowering stage. Any help would be greatly appreciated. i have pics of items in question TIA I am going to buid a grow box 4l x 3w x 4h if you agree.