Acroholic;678297 wrote: I currently have AIs on all my tanks, but I don't really have practical long term experience with them over SPS because I had almost total losses of my SPS and LPS corals well under way before I placed my AIs over the tanks.
I think my issues were from an unmaintained sulfur denitrator that was long term pumping H2S into my system. I have since serviced the denitrator and taken care of the issue, but I have shifted the focus of my tanks to LPS. I may try SPS again, but not for a couple months at least.
I ran my AIs at 90% initially and burned a couple of my corals, but they were on the way out before that. I installed all 70 degree optics on mine.
You will have areas of higher PAR from overlapping point light sources, whether LED or halide.
You will find a few threads saying that AI Sol Blues and SPS don't mix, but you will find a ton more threads saying that LEDs are great for SPS corals. Here is a Reef Central thread about a 340 gallon tank that has had AI LEDs over it for 2 1/2 years, and the SPS corals look pretty nice. Looks like pretty good long term results to me.
http://www.reefcentral.com/forums/showthread.php?t=2029329">http://www.reefcentral.com/forums/showthread.php?t=2029329</a>
Are some of these threads saying AIs gave great results with SPS fabrications because people don't want to think they wasted their money? Maybe.......or maybe not.
[B]Another point to consider is that an individual's experience over the short/long term is not necessarily another Reefer's experience over the short/long term, and there are other factors that can affect color and growth in addition to lighting. It is not always as cut and dried as "A caused B," or "this AI Led caused this condition."[/B]
Finally, slower SPS growth may be associated with LED lighting, but that is not necessarily a bad tradeoff, given the electricity savings and cooler temperatures you get in return? Nice not having to run a chiller any more as well.[/QUOTE]
I cant agree with the part of your statement that I bolded above more. This is an ENORMOUS issue in our realm of this hobby. The science and technology has come so far, and we all embrace it, yet do not apply it to cases like this. For example, what causes SPS to grow and color? Is it "Light"? Does that mean spectrum, intensity, photoperiod, etc? Or can it include temperature (of the water), calcium, alkalinity, flow, or any number of other factors? How sure are we that "nothing else has changed"? Essentially, the deductions we make are horrifically unscientific and archaic at times. When changing a lighting regime, for established corals, can that indicate ANYTHING about the efficacy of that lighting system? In my opinion, no. Furthermore, people take so little time to actually understand their corals needs. For example, does anyone consider the photsaturation and photinhibition of their corals? For a lot of corals, this is already determined and defined. So, when we increase or decrease light to the ranges within, are we even considering what the CORAL can take? And not immediately blame the equipment?