The best is to check out liveaquaria.com to get a good general idea of where certain corals like to be placed. But even still, every coral is its own, and sometimes you can have the exact same species in the same tank with one loving the very top and another one hiding under a Montipora.
Not many LPS are super high light, in fact many enjoy much lower lights, on par with those used to keep mushrooms or zoas. Just read other's experiences and eventualy you will become adept at being able to pick out a generally good spot for your coral and fine tune its placement from there. Happy Hunting!
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