Hi, I'm building a grow box for my first grow, but I wanna make sure this is an accurate size, I'm growing auto NL from cks. The box stands 4.5ft high and 3.5ft long and 28 inches deep. This is my first grow. I'm gonna be using cfls for now, then switching to a marshydro 300w for flowering.. will this work or is my box to small ? I designed it my self hoping to grow 3 plants at a time with the Scrog method. I just have no clue what I'm doing lol. Also if this grow is successful will I be able to grow a regular strain in this size box? I was hoping to go with cks blueberry strain after this first grow. Also, if the 300w marshydro won't fit I'd just get of the circle ones lol. Help please!