I no longer grow using a 1000 watt system. I'm now just a 670 watter. I took one of my old super sun reflectors and cut a hole on the opposite side. I now have an eye 400 blue on one end and a 270 watt super agro on the other. Makes for a pretty good over all spectrum. And I get get almost the same yield as before with a mover.
By the way, in regards to the 1000 watt compared to the, 600 and 400, there was a drastic change in plant and bud structure.
I have my grows pretty damn dialed in, but I'm no pro. It's just a hobby for me.
Peace