Puks:
I assume your LED fixture is quite powerful. If true, many LPS can get bleached in the top level unless the light can be dimmed. But many will adapt to those levels if acclimated correctly. Trial & error is the only way to know for sure. I'm not famiar with your brand of light, but if you have less powerful 1watt bulbs LPS may not get bleached in the higher levels.
I would place frags in the bottom half of the tank at least for a few weeks, watching carefully. Then move them up towards your final desired location before glueing them down. Be watchful for bleaching or other negative signs and correct as necessary by moving them down again. Buying frags that have been cultured under intense LED or metal halide lifhting may be an advantage. Keep in mind most LPS don't like being blasted with super strong direct flow either.
More info on the technical specs of your light fixture & what LPS you would like to keep would be helpful too.