This thread isn't worth it, but, the shorter the electric lines the more efficient, I shortened everything in my garden, ran new 220V lines from the panel straight to the growroom and installed a sub panel, and four outlets per room, the ballasts could be mounted on the hoods, but there was a ledge in the room big enough for the ballasts, I shortened all the lines from ballast to amp and used a higher gauge braided wire.
When you're running lots of juice... 8X600W HPS, efficiency and safety is a priority.