Low light LED - Current Satellite LED Plus?

[hoppingtetra30]

Im currently running a 75 gallon low light setup. I have 2 48" 40 watt T8 fixtures with Hagen Life Glo bulbs. They are All-Glass fixtures and seem to have really good reflectors. My plants are doing EXTREMELY well; everything I have put in there grows like crazy, so Im quite satisfied. Im currently just dosing 1 cap-full of Flourish and Excel per week.

I was in my LFS the other day and the guy was trying to up-sell me on some HO fixtures and a CO2 setup...Im really not interested in moving to that kind of setup right now, BUT, I really liked the looks of a fixture he showed me...the Current Satellite LED Plus.

What I really like is the different light settings, and the lunar lighting which would help with some light shy fish I have and let me see in my tank at night.

After doing some reading it seems that maybe I would need two of these to get close to the lighting I have now...is that right? Especially to get a good spread from front to back in an 18" wide tank? Would I maybe be better off/able to just use the PRO version? Its seems to have about double the output, plus I like that its programmable, but I still dont know about the spread.

Maybe I could somehow add some lunar lighting to my current setup and that would work as well?

 

[hoppingtetra30]

After doing some more reading I think I would really like to swap to the Satellite Plus PRO at some point. I just really like the program-ability. What I really need to know is would a single light be enough for an 18" wide 75 gallon heavily planted with low light plants?