Blame it on the lights.

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I keep reading about people all over the forums complaining of poor colour, browned out SPS corals and poor growth. Many of these people blame it on their lights often pointing at their LED's being the culprits but are they? Personally, I think not most of the time. I have had all manner of lighting in my 35 plus years keeping corals from simple fluorescent tubes through to mercury vapour ( anybody remember them?) with HQI (metal halides) being the big break trough in lighting.

My current lighting consists of AI Hydra 26s (not the new HD I hasten to add) While early lighting was poor (pre HQI) for coral growth and colour we have made massive strides in lighting with LED's leading the way. I get good growth and great colour with my Hydras so why it some complain of poor colour and or growth in their SPS when using LED's is the culprit some other factor? Some go back to T5s and others even HQI in an attempt to resolve the issues but there is controversy and so many differences of opinions everywhere.
"
I just don't get it and yes there will be people who will tell me I switched back to whatever previous lighting and things changed for the better" However that does not explain why many of us have good colour along with good growth just using LED's. There is no way I could see myself going back to T5s or HQI lamps for a whole variety of reasons but I won't bore you with them. We all know the advantages LED's have over other forms of lighting ( some may say disadvantages as well) they have been stated often enough.

However, I just don't see LED's as being the root cause of poor growth and or colour in corals. Sure all LED's are not created equal. Having said that I have seen great colour and growth in SPS corals with people using cheap Chinese multi spectrum LED units as well as LED's like Radion's at the top end ( I am not saying Radion's are at the very top of the chain just that they are near the top) I have however seen LED corals that look so false, unnatural and gaudy as to put me off them but that was down to the colours dialed into the likes of Radion's more than the light itself.

Which brings me to another question. What do people want from their lights? Do you want over saturated colours or more "natural" colours? I say "natural" as unless you view a coral in it's natural environment on the reef how do we even know what it looked like in the wild? I guess most people go for a colour look on their tank that pleases them to their eyes and bother little as to how any coral would look from whence it came.

I have moved away from my original intention for this post but lighting plays such an important part of our hobby and gets so many conflicting views I just had to add my 2 pence (OK cents to you) on a couple of my own thoughts on the subject. The controversy will run for some time to come that's for sure.
 
Very well put. I agree that it is not only lighting there are other factors of a successful reef tank in regards to coral growth and health.
 
I think it is the balance between nutrients and lighting. If you switch lights without changing your nutrient ratio you will result in a change in growth and color pattern. This is seen most drastically with sps. It is easier to find a light that works best with the nutritional balance of your tank then trying to tweak a lot of other parameters. That is if your not having any other nutrient related problems such as algea.
 
This is good and I have "blamed" the lights before until I was having the same problem under all the other lights as well! HA!
 
IMO one of the issues I see with fixtures is spread of light.
For instance my tank is quite dark on the sides so built a longer fixture to help cover the ends.
 
I keep reading about people all over the forums complaining of poor colour, browned out SPS corals and poor growth. Many of these people blame it on their lights often pointing at their LED's being the culprits but are they? Personally, I think not most of the time. I have had all manner of lighting in my 35 plus years keeping corals from simple fluorescent tubes through to mercury vapour ( anybody remember them?) with HQI (metal halides) being the big break trough in lighting.

My current lighting consists of AI Hydra 26s (not the new HD I hasten to add) While early lighting was poor (pre HQI) for coral growth and colour we have made massive strides in lighting with LED's leading the way. I get good growth and great colour with my Hydras so why it some complain of poor colour and or growth in their SPS when using LED's is the culprit some other factor? Some go back to T5s and others even HQI in an attempt to resolve the issues but there is controversy and so many differences of opinions everywhere.
"
I just don't get it and yes there will be people who will tell me I switched back to whatever previous lighting and things changed for the better" However that does not explain why many of us have good colour along with good growth just using LED's. There is no way I could see myself going back to T5s or HQI lamps for a whole variety of reasons but I won't bore you with them. We all know the advantages LED's have over other forms of lighting ( some may say disadvantages as well) they have been stated often enough.

However, I just don't see LED's as being the root cause of poor growth and or colour in corals. Sure all LED's are not created equal. Having said that I have seen great colour and growth in SPS corals with people using cheap Chinese multi spectrum LED units as well as LED's like Radion's at the top end ( I am not saying Radion's are at the very top of the chain just that they are near the top) I have however seen LED corals that look so false, unnatural and gaudy as to put me off them but that was down to the colours dialed into the likes of Radion's more than the light itself.

Which brings me to another question. What do people want from their lights? Do you want over saturated colours or more "natural" colours? I say "natural" as unless you view a coral in it's natural environment on the reef how do we even know what it looked like in the wild? I guess most people go for a colour look on their tank that pleases them to their eyes and bother little as to how any coral would look from whence it came.

I have moved away from my original intention for this post but lighting plays such an important part of our hobby and gets so many conflicting views I just had to add my 2 pence (OK cents to you) on a couple of my own thoughts on the subject. The controversy will run for some time to come that's for sure.

I had browned out sps and slow growth with ati T5. I switched to chinese led and growth took off and everything colored back up. I didnt change anything else.
 
I had browned out sps and slow growth with ati T5. I switched to chinese led and growth took off and everything colored back up. I didnt change anything else.
This sounds like too much nutrients taken in with not "enough" light to use it. I say enough but it is more that plays into it than just intensity of course.
 
4 Hydra 26's across the top of a 90gal. Spectacular coral growth and color. No browning at all. I can not feed my coral for long periods and still see great results.
 
This sounds like too much nutrients taken in with not "enough" light to use it. I say enough but it is more that plays into it than just intensity of course.
Could have been too much but I am very happy with the changes that have happened with the LED lights.
 
Lighting is not a silver bullet. You not only need good lighting you also need good flow, good food, good Coral placement, great water quality and great water chemistry. That being said if all other factors are equal, a better quality light will give better results. Many lights waste a lot of energy on wavelengths that are not beneficial, or minimally beneficial to the coral as far as growth or developing protective pigments. Not all lights are created equal. For example one of our best-selling items is our retrofit PCB board that allows you to take any standard eBay black box and bring it up to our Spectrum for increased growth and color development. Most customers putting them into say a "Mars Aqua" have to turn intensity down around 20%. This is because our wavelengths are concentrated near the peak absorption rates for chlorophyll A and C, as well as the cartenoid peridinin. Heavy use of 420 nanometer as well as some 395 nanometer true UV helps with the development of protective pigments as well. Rather than the shotgun method used by most LED lights. We have just enough of the other wavelengths for proper Aesthetics and color rendition. It is true you need some red, green yellow in order to have proper Aesthetics. Otherwise everything will look washed out. However most lights have far more warm white, red and green than needed. Some red between 640nm and 660nm is needed for proper growth hitting the much smaller secondary absorption spikes for chlorophyll A and C, but there are many studies that have shown the negative results of having too much. Not to mention encouraging nuisance algae.

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it took me 3 years to "take a chance " on leds . I am not even 2 months in with them now and I love what I am seeing . Iwas getting way too much heat from halides and I knew I needed more light . It was either go to extremes and set up 400 watt radiums and jack up my electric bill and have to run a chiller like crazy or switch to leds . I am getting better PE , growth and color with hydra 52 than I ever did with halides or T5 I will never go back
 
I find some of the time people are leaving something out. There was a post recently about temp problems. And how every thing was dull and faded. Then it was revealed that not only the temp changed, but a Refugium was added as well a uv. But they were convinced it had to be the 1.5 degree temp change. Sometimes it is what it is.
 
Well I have eliminated my lights as the cause of my good colour and growth in my corals ;)
 
IME, under the same water conditions I switched out a 1st generation Radion for a HQI Pheonix and in a few weeks my sps improved , like night and day, not just a little better. I couldn't care less if MH or LED is best , but that's all I changed ( a few years back) and that's what happened.
 
My SPS were not encrusting and the bottoms were slowly bleaching out so I added 2 T-5's and now they are encrusting and regaining color underneath. It would be hard for me not to blame the LEDs
 
My SPS were not encrusting and the bottoms were slowly bleaching out so I added 2 T-5's and now they are encrusting and regaining color underneath. It would be hard for me not to blame the LEDs

Blame mine for the colour growth and basing out then ;)
 

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