I have an 8x12 with 3x600 in big kahuna hoods and is absolutely perfect for my room. depending on the hood you choose (size), you can do 4x600 inline, or 4x1000 if you can control the heat your gonna get. or do 3x600 in a big hood and use the side lighting for smaller plants. I do this, and put them on a table to get higher to the light.