Nova T5 HO Lights

I have a 48" version of that over my 75g. 108w of T5 seems to be fine for Bacopa, Sword, and elodea, but not enough for Sagitta Sublata.

Light itseld is pretty nice, although I busted the corners of the plastic tracks trying to slide the feet in. That's a pretty poor design, but you'd ave to look really hard to notice. And it's my only complaint.
 
I plan on using it for a 55G. I just used the link to show which one I was talking about. I haven't decided where I plan to buy it yet. so the demensions would be 48" long and 18" high, if it matters. I don't think the light lost between an 18" high tank and a 20" tank is that significant. If we were talking feet then I would consider it. I want to be able to use this for some medium to low light plants. High output T5's are more efficient than T12's and the wpg thing works only for T12. So I really want to know what plants people have grown under the 48" version or what plants should work. By my estimate, if we go wpg, this light should be around 150 watts of T12.
 
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