DON'T run 'em at 100% to start...... I think your corals will adjust better starting at 30-40% and then going up. I've blacked out my full sps tank for 5 days before with no effect on the corals. Leds look dimmer to the eye, but for some reason, it's super easy to bleach the sps not even full power.
Consider DIY as opposed to another 2 SOL units. That way you won't get spotlighting. That's what I did and I'm loving it and think I got the best of both worlds.
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