I was going to go 4x4x8 but my friend has 2 whole bedrooms setup. And my other friends went with me to buy the equipment and convinced me to go 4x8x8 and when I was at the garden store the worker offered me 2 complete setups for 1400, only thing was some of the items were used for 1 grow so I bought them anyways. When he delivered he gave me new bulbs and ballasts. I sold 1 setup to a friend for 700.