I have my AI Sol, running at about 35% over my cube, I find anything higher is too bright, and ticks off the coral. From what I am seeing online and first hand, LEDs are right up there with MH in terms of brightness, but are not as prone to browning out corals.
I think that if you dont mind minor dark areas, you can definitely run them higher hang them higher and get the same results, also as we know many leds have options on optics that you can choose from, I believe AI has 70 or 90 degree, I cant remember which, but with a wider lens I see no reason that you couldnt run less lights at higher intensity. after all, to me 4 sols on a 4' tank seems like a waste, 2-3 would be more then adequate. provided they are suspended just right. It may limit what you can keep on the sand bed once you get to a certain height, as we know light gets less intense the deeper it has to penetrate, but for me, my softies on the sand bed and sps high, lps low to middle, it seems to be perfect! thats just my opinion though
