I don't feel like 2 sols would be enough. I would say at least 3. If you're dead set on only using 2, make sure to mount them at least 12" above the tank. This said, it will depend on what you're planning for corals.
As for intensity, I'd say start at ~30% and ramp them up very slowly. I've yet to determine the magic ramp up rate, but go slow.
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