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I have never had those lights. Also, there is a big difference in clam light between the different species.
Can you get any PAR readings on them? If they are anything like a Kessil, then they might struggle that deep anywhere outside of the 6" area RIGHT underneath the light.
Deresa or Squamosa might be OK if you can get 200 PAR. I would avoid Crocea and Maxima.
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