I am looking at setting up a low tech / low to med light planted tank but am wanting some help as far as lights go. It is a marineland 47 gal column tank which means that it is rather narrow but deep. From top to bottom, it is about 30". After I put in my substrate, it will be approximately 28" to the substrate. The question is, what lights do you recommend? I was looking at Hoppy's PAR thread and it looks like T5HO are my only option in order to get that deep. Any suggestions?