Both being photosynthetic, I would not put them in shaded area. Mid level seems OK depending on what type of bulbs. Any Metal Halides bulbs? Is there more than one switches( plugs) for lights? if so, you can use timer to increase/decrease light as day progress. Most intense lighting in mid day (4-6 hrs/day), but as I mentioned, depends on type of lighting (bulb). Acclimating corals to stonger light is good pratice also. If you have stronger lighting than
LFS then have them
acclimate to stronger lighting by placing them low and gradually move them upward to prefered location for each coral.