I agree - I'd do a night light cycle, which will offset your heating *and* cooling costs, and I think is less likely to freak out your corals.
Fan cooling with ATO is a big energy saver, and get a temp controller so your fans and heaters aren't fighting each other.
You could also do intense lighting for only six hours a day, with sunrise/sunset and blues taking up more time.
Depending on where you are in Monterey (eg, not Salinas), your temp will probably be more stable.
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