MAXIMA are they hard to care for?!?

One good thing you get from a MH that you don't really get from other lights are light spikes. You know on a tank with MH lights you see all these shimmers and stuff all over. Well, from what I read once, corals/clams that require high light love these spikes of light. Cause you may have 250W light, but in a spike where it is more concentrated, the light the coral/clam takes in is much higher. Hope this is making sense. But, this is one reason why some clams don't do as well in no MH tanks. Don't get me wrong, I have friends that have clams in tanks with PC lighting, and after a year, the clam is still alive and well. But, they usually do better in MH tanks. Just my small two cents.