Will I be able to grow SPS through this?

Rich is totally right, the WPG rule is useless... the 250 is intense enough for any SPS as long as the SPS are within 2'x2' of the pendant. That is a sweet reflector by the way. You should be okay with the brace, no need to shield the bulb either.
 
Sorry man I thought you were only planning on 1 MH for the whole tank. 3 MH's with 4' vho's will rock that tank.

Where is your other thread reguarding your whole setup?
 
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