I haven't seen that moon light system. What I did see and like is this:
theLebos.com - LunarTracker Basically they are the same company just one comes standard with a dimmer, while the other comes with the lunar tracker which is used to mimic the lunar cycle of the moon!
To answer your other question, YES moon lights are an important part of your reef environment. It adds another real life dimension to your tank, just as the moons lunar cycle is pertinent to our oceans and the livestock that call it home, the same holds true to our tanks. Maybe not with regards to the waves and tides, but on a smaller scale, it has to do with the spawning of fish and corals.
As you also mentioned, it is a nice switch to the intense lighting displayed on our tanks during the daylight hours, which enables you to view your tank and the inhabitants that are usually not visible during the day... It is a whole different environment at night!!!!
Hope this helps to shed some light on your questions!
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125gal.w/Mag9.5 return(dual megaflow)>Mag7 pump Aqua Cev180skimmer.Wave2k Hamilton Reefstar(2)250watthqi(mh)pend.a Yellow, Naso Tang Red Lip Blenny Percula Clown Demoiselles Niger Trigger F. Wrasses Cerianthid Stars Hermits snails Zoos shrooms Montipora Brains Gorgonians Favia Turbinaria Kenyon Tree Acropora Xenia Tridacna (CroceaMaximaSquamosa)
"IF THE PHONE DOESN'T RING...IT'S ME"

jb
associated content.com
aka parrothead