wondering how big i should make my flower room

Hi guys, for my flower area i have 2 600watt hps that i would like to use. what i don't know about is how big should i make my flower area. I am building a new room and have the option of making it as big as 8x12x6high or i can go with a smaller room. i dont know whether to make it big so i can move around easily, or make it a tight compacted area. i would love to make it as big as possible, but i am worried about loss of lumens/what not due to the size of the room. if i were to go big i would put both lights by one side of the room, then the other side of the room i could put my fans, dehumidifier etc.... out of the way of the actuall growing plants. i just dont know, if cramped spaces would allow for higher yields then maybe i should forget about the bigger room idea....... any input ?

no one able to help me out on my decision?

how many plants do you want to do? two 6'rs depending on how you set them up can do around twelve plants or so. i just finished up 6 larger plants under two600s. around 4zs a piece. from my experience 1ks are unmatched. i have a seperate setup in a 5x5 with one 1k and it blows away the 2 600s. and also from my experience GO BIG dont build your room too small or you will regret it. for your 2 6oos i say you plan on having plants under them in a 6x4 or 7x4 space

Im with low on this. Look into your plant count and style you want to grow. If you use the 50W/sq ft recommandation, then each light can do 12 sq feet which you do have the space for no problems. Do you want it to be perpetual or is it a plant veg flower smoke fire and forget setup