Oh yea, I forgot to say that before. That is exactly the one I am talking about. That is the kit I started growing with and still use to this day. Since then I have added another 600 watt light but I am still using that 400 watt system from HTG Supply. It is plenty light for your plants. You could probably go with up to eight three-foot-tall plants under it. Just make sure you have some good air circulation set up before you put that light in there. It will make a good amount of heat. While the kit doesn't have a digital ballast, which is what I prefer, it is a great deal for the money and I think a perfect starter kit for someone just getting into the game.