well ive been scanning the web for a new light fixture and they are way to expensive for a 180+ watt one, so im going the route of making my own. does anyone know anything about this stuff? i currently have a fixture. but im just going to gut it and start from scratch. so ill have the plastic part pretty much. so i know ill need a ballast and i want to try and get 4 bulbs in there. so would i need a ballast for every bulb, or could i get a big one and have all 4 bulbs connect to it? thats where im starting at least. i think ill go with the T12 bulbs at 24" (4 of them) i would get them around the 5000k mark, because i think thats the closest to sun light (correct me if im wrong, because ive heard 10000K too) the new light fixtures i see on websites have 2 white bulbs and then 2 of these blueish looking bulbs...what are those? and should i go about doing it that way instead of the 4 white bulbs?