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- May 22, 2016
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Thank you for the advice. I have never heard lighting explained as clearly before. You give me something to do, besides turn the light on and guess.I can hear the frustration in your post man truly, and trust me you are not alone. Thanks a lot for the post. Sps can be extremely adaptive and resilient, but the key is to do thing gradually. You can hit and acro with 800-1000+ par if its been acclimated properly for sure. And it may take a while to really fully adjust and thrive but it can and will. Of course, this is more of an extreme example and not really a suggestion. What will stress out sps tremendously is rapid and dramatic changes in intensity. Frags are certainly more resilient to this sort of thing, but more mature pieces may not do as well.
When it comes to individual vs overall intensity, like those adjustment parameters found on the Radions for example, consider the spectrum sliders only as a means to dial in your visual aesthetic. The overall, is the measure of total intensity of that aesthetic Not much different than a sound mixer in many regards. Guitars, bass, voc's and drums can be blended any way through the individual volume/gain sliders to balance the sound the best, but the master volume still controls the total volume of the mix.
If you have access to a par meter, a really good starting point would be to measure par at the surface, just above the water line and dry, at anywhere from 500-800. Using this standard, you can raise the light as high as possible to get better spread and coverage, and adjust the over all intensity to hit around 500-600 around the center of the light, just above the water line. Distance from the water is irrelevant then as long as you are hitting your target par but I really prefer to get that fixture as high as possible, especially in instances where bleed over isn't a issue. Not sure how deep your tank is but this should be ample enough to keep sps pretty and not to pale them out, but you're concerned at all, then go to the lower end on that and measure par at 500 at the surface. It's a starting point for sure, but just remember to make any changes gradual and give coral some tome to adapt.
If you have any other questions at all, please don't hesitate to post.