The original focus of the research for that MACNA project was to explore the possibility that alkalinity, acting as the inorganic carbon source, would impact (probably increase) the rate of photosynthesis. It did, although we should be careful in extrapolating results. The second thrust was to investigate if shallow tide pool corals could adapt to high intensity light (they. Porites species, could not and needed surprisingly little light. This is the second case I examined. The other was a Pocillopora damicornis, and it too reached a maximum rate of photosynthesis at relatively little light.) These results suggest that these corals have a maximum light requirement and it is not unlimited adaptation and it is probably safe to apply these observations to other corals containing these specific clades - almost certainly C15 for the Porites.) Water motion was, again, investigated - would it increase the rate of photosynthesis under a given amount of light? It did. And, finally, where did zooxanthellate inhabit these corals (it was mostly in the shaded portion of these tide pool corals.) So, lighting in and of itself, is not the only factor affecting photosynthesis. Hence I wrote 'Things to Consider.'