Will 175w work for maxima

[namscam]

ok I got a 80 gallon tank thats 24" high....with like 4" sand bed..I have a dual 175w 4 inches away from the water. would my clams do well?? I have a maxima, ultra maxima, crocia, and squamosa. How far do u think can I place the clams?? I would like to put them on sand bed but dont think they will do well. right now they are about 12 inches away from lights. what do u guys think??? how far away from the lights will these clams do well?

 

[Diehl]

I have a 90gal reef with a 4" Maxima on the rock work I also run Duel 175watt MH's and Duel VHO's It is doing great and very colorful. I also keep various SPS also Yes its enough lighting but not for the sand bed