U have plenty of room...assuming that ur dimensions are in feet! for maximum ease ...simply pin a wooden frame along the middle of the ceiling and then continue the frame down the walls to the ground and along the floor so the frame joins up as one and separates the room into two boundries.u can then staple black plastic liner [or anything light proof] this will give a managable partition in which u can block the escape of light and keep a constant bud turnover between the veg room and the flower room[ try downloading 'I Grow Chronic' from the internet it will show you excactly what i mean plus some usefull hydro 'how to' info. if i had that much swpace to play with i would grow far too much ganja!!