FIRST SALTWATER TANK, NEED HELP

Perfect, thanks, how much should I turn it down?
Impossible for me to say. It depends on par for your tank and mounting height. If you are doing soft corals be careful not to give them too much light. You could try and find somebody on the forum or YouTube that measured par for this light. Without a par meter you will have to use your best judgement. Start at a lower setting and look at your corals to determine if they need more.
 

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