vwmike,
Before you go changing out your lights tell us a little more about your tanks parameters. I see in your signature you have a Emperor 400. The bio-wheels in this style of filter is a nitrate sink and could contribute to your brown colors. I recommend testing for P04 and N03 using a low range test kit and going from there. Lighting is an important key but there are many other factors too that will affect colors. Just my .02