Minimalistic multichip DIY LED build

So i just emailed them and the ask how would I improve on the 100w chip lay out any thoughts
 

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skunkmere said:
i dont think you need to worry about the copper. think of all the stuff in any light fixture that would be released if submerged in the tank for a long period of time, it doesnt really happen.
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Yes and no here. ARe the lights high enough that there is no chance of getting a salt water mist on them. In myt bsement I have some copper piping running on the other end of my fish room from my salt water tanks. After about a year and halg this piping started turning green with salt deposits on it. So it does seem to atract any salt that is in the humidity. Sure it shoulkd not effect the tanks unless it is submerged but it will deteriorate faster than if were not near salt water.
 
rickyb said:
Are these any good? Which led options will be best for a SPS reef?
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Wow What chip is this and where can I order them?

I love the availability of LED colors if they are using decent quality Emitters.

For starters I'd get all the LED's between 420 and 490 into the system. Looking at the output chart to get the most output at 455 with less output as you move away from that frequency.

For white lighting I'd sparingly use the Neutral Whites probably in the range of 1/4 to 1/5 of the total chip output. The neutral white not only provide enough white light but also will give enough light in the red range.


Bow keep in mind that color selection is extremely debatable. This is just my rough summary with limited information on the this chip. I have no idea how any emitters we are talking about here for a total count. Is it one emitter per channel? Is is 10 Emitters per Channel? Can you mix the LED's on the same Channel, or does one channel have to have all the same emitters?
 
Colors in the multi-chip they can mix freely.
I attach some 10W multi-chips of my layout and their spectral characteristics.
My spectrometer is very simple, therefore graph does not look like from the professional equipment and is not very accurate but only approximate.
These multichips are tuned to the dominant cold blue (465nm). Nevertheless, the overall color tint is darkish , actinic enough and emit broadband, full spectrum of light.
By the chips are very close to each other is achieved excellent mixing colors of light without any negative side color effects.
Sorry for my bad english.
http://www.leds-global.com/customized-10w-multichips-led-for-aquarium-p-366.html
 

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TropTrea said:
Wow What chip is this and where can I order them?

I love the availability of LED colors if they are using decent quality Emitters.

For starters I'd get all the LED's between 420 and 490 into the system. Looking at the output chart to get the most output at 455 with less output as you move away from that frequency.

For white lighting I'd sparingly use the Neutral Whites probably in the range of 1/4 to 1/5 of the total chip output. The neutral white not only provide enough white light but also will give enough light in the red range.


Bow keep in mind that color selection is extremely debatable. This is just my rough summary with limited information on the this chip. I have no idea how any emitters we are talking about here for a total count. Is it one emitter per channel? Is is 10 Emitters per Channel? Can you mix the LED's on the same Channel, or does one channel have to have all the same emitters?
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From what I read they make your chip however you want. Out of all those leds available which 50 would you choose? and in which channels?
Here is the link http://www.aliexpress.com/item/Led-aquarium-light-for-coral-DIY-50w-multichips-LED-aquarium-led-chip-best-for-fish-tank/1551086606.html
The bad part is that you have buy 10 minimum.
 
Okay 5 Channels with 10 LEDs per channel.
1. 2 640nm Reds with 8 Neutral Whites LEDs.
2, 1 490 nm , 1 500nm, and 8 cool white 7,000nm
3 . 2 470 nm, 4 460 nm and 4 450 nm
4. 5 450 nm, 5 460 nm
5. 2 420 nm, 4 430nm 4 440nm

These can probably be debated up and back. But if you vary the intensity on each of these channels you should be able to get what most people would be happy with.
 
007Bond said:
Hey Dennis,...what about if you were looking for 100w would you just double the colors you posted? Thanks,---Rick
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Yes as long as your putting each series on a separate dimmable driver. With the dimmable driver these can be tuned to virtually any level combination the user desires. If he likes a fuller spectrum lighting system he turns the 1st and 2nd channel up higher than the others. If he wants a super florescent effect he turns channel 5 up higher than the rest. If he likes a variable effect with strong florescence at dawn and dusk he might try something like simply starting with fading channel 5 from 0 to his desired level then working up the channels gradually increasing them in refers order till they are all up to the final balance he wants for mid day viewing.
 
Dennis, thanks for answering my question. One more please,...you have been following this thread for a long time, as have I. What do you think about the leds used in the dream chip vs. the colors you posted. In other words the seller says to pick any color leds and they will make the chip, so in theory you should be able to build the perfect chip for coral growth, and color ect. The color thing is what I don't understand,... no matter how much I read? Thanks in advance,---Rick
 
Been watching this thread for a while myself. Actually surprised it still lives. Surely I've missed a lot but seems to me going with smaller, multiple 10 watt multichips of various colours would be safer than putting all your eggs into a 100 watt or bigger chip with multiple channels. My build is all 10 watt multichips. If I lose a 10 watt chip no big deal, if I cook a costly 100 watt chip, even one channel, I'm out a few dollars more. Plus, with the lower power chips, it's much easier to tune the spectrum without breaking the bank, not that spending $100+ on a 100 watt multi chip will put me in the poor house, but I still like to spend my money wisely.
 
007Bond said:
Dennis, thanks for answering my question. One more please,...you have been following this thread for a long time, as have I. What do you think about the leds used in the dream chip vs. the colors you posted. In other words the seller says to pick any color leds and they will make the chip, so in theory you should be able to build the perfect chip for coral growth, and color ect. The color thing is what I don't understand,... no matter how much I read? Thanks in advance,---Rick
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Yes I think you can talk to any two of the top experts in the world on lighting spectrum's and they will have some disagreement. There are the known photosynthesis wave lengths. Each of the important photosynthetic proteins have a peak absorption in the blue range of the spectrum. Some will argue that is all they need other will claim they need light at everyone of there absorption peaks.

Then you have the florescent proteins. These are the ones that make a coral the fantastic colors we enjoy. Each of these have have an absorption as well as a emitting wavelength. But these are much more variable from one type of coral to another. The ration between these proteins also vary by the type of light that the coral was exposed to . Deep water corals have a tendency to have more florescent proteins that absorb blue light while shallow water corals have more that absorb green and even red light.

Finely you have the need for full spectrum light. This is what we think of as the white light that consists of a balance between every visible wavelength. Again you personal taste here some people like to see all the colors of there fish that are reflected and some corals that have low to no florescence, others want the florescence to dominate the tank and prefer seeing it on a darker background.

My theory is since there are so many opinions and differences in tastes is make it adjustable for the individual. Start with a fixture that is capable of producing slightly more than enough light in each of the ranges that the user could want. Then allow them to dial in the balance that best suites them.

Gojng back to the light combination I gave you I'd start with dialing all the channels to 50% of full power. Ten start tweaking them one at time by 5% increments to see if they improve the lighting to your taste or not. Keep repeating this several times through all the colors untill you get on them to hit 100%. This then is the rough ratio between all your colors.

If you want a dramatic sunrise and sun set then set the system to start with channel 5 and bring it up to the predetermined brightness, then go to channel 4 and do the same followed by the same thing for the remaining three channels in order. Your being in the super florescence first then extending the florescence and you start stimulating growth while you finally bring up the reflective colors.
 
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