Hey everyone. I'm looking for a 150W HPS grow light system (one that includes the lamp and ballast, and bulb if possible). I found this but I don't totally understand what it comes with. It says "Enclosed Ballast Light." Does this mean the ballast is actually a part of the lamp or something like that? Any information is extremely appreciated. Here is the link: http://www.elights.com/sun900552.html Thanks!