very interesting indeed. And you can definitly see the difference in coloration that the corals change when under mh vs solar. I can see this option with a light sensor to activate supplementry lighting as something to be used on a larger more permanent tank setup. Ill be honest though, I have one of my tanks right by the window and early in the morning when the sun hits my frags in it, the open right up and bend towards the sunlight instead of the 150 watt MH sitting 6" above them.
So to say the least, natural sunlight is way better and probably far more intense then most manufactured light systems.
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