get the 2x150w HQI +2x 54 w t-5s, throw some decent bulbs in there and you will have no problem keeping acropora/ high light sps with decent growth rates in the top 1/2 of the tank.
In the bottom 1/2 most montis, poccis, stylo, sertis etc would do fine, some staghorn species of acropora will do fine as well as long as other husbandry is sound (flow, mineral demands)
Only thing like some mentioned, would be advisable not to keep tridacnid clams on the bottom of the tank because of its depth and only 150watts of halide to punch through it. However, IMO if the water is kept nice and polished, lights kept clean, bulbs changed often and you add an appropriate food supplement regularly, I see no reason why it wouldn't be possible to keep a lower light demanding Tridacnid species like T. derasa or T. squamosa.