LED lighting question

[dz6t]

For general lighting for human being, RBG LED are used to blend color. It is like TV, by changing the intensity ratio of RGB, human eyes (brain) can PRECIEVE different color.
I don't have to go into detail because it is well known science.
When lit under RGB LED, we see white, but the three narrow LED wavelength that trick our brain to see white won't be the same as true white light which is composed of many various wavelength of photon.

 

[dz6t]

so what happens to corals when they don't get this white led and over what period of time?


- Archit

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If you look at the photo synthesis curve of coral (not the same as tree and flower), the uv and blue carry a very significant weight of photosynthesis. If your led has no true white, some coral will still grow but some will suffer, depend on the type of algae and pigments the coral carry etc etc (complicated stuff).

 

[dz6t]

It is well studied, ATI, Ecotech, AI, Maxspect, Kessil (intergrated), Vertex, Giesemann, ReefBreeder, Cheapo Chinese LED all have white LED in them.

 

[LoveTheReef]

If you look at the photo synthesis curve of coral (not the same as tree and flower), the uv and blue carry a very significant weight of photosynthesis. If your led has no true white, some coral will still grow but some will suffer, depend on the type of algae and pigments the coral carry etc etc (complicated stuff).

I promise I can understand complicated stuff just fine as well as at least 50% of BRS community. I'm trying to learn so instead of thinking we can't understand, I think it would be a lot more productive if you go in depth.

So based on your statement, which corals would suffer and how can we tell they are suffering? Less growth? Crappy colors? Melting away? And how long would it take for such symptoms to appear?

Also you mentioned uv and blue, yet went back to white leds being important. Are you saying white leds emit UV and blue spectrum? More than the bulbs that emit these spectrums themselves?

Lastly, have you measured spectrum readings under fixture with white leds and fixtures without? If yes, can you post them so everyone can be educated?

Thanks,

- Archit

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[dz6t]

I promise I can understand complicated stuff just fine as well as at least 50% of BRS community. I'm trying to learn so instead of thinking we can't understand, I think it would be a lot more productive if you go in depth.

So based on your statement, which corals would suffer and how can we tell they are suffering? Less growth? Crappy colors? Melting away? And how long would it take for such symptoms to appear?

Also you mentioned uv and blue, yet went back to white leds being important. Are you saying white leds emit UV and blue spectrum? More than the bulbs that emit these spectrums themselves?

Lastly, have you measured spectrum readings under fixture with white leds and fixtures without? If yes, can you post them so everyone can be educated?

Thanks,

- Archit

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Since you are a vendor for Pac Sun, I guess it is more appropriate to carry further discussion off line.
I said "complicated stuff" because I am too lazy to write out a lengthy post, and that is all. Please do not take it any other way.

 

[wdebenedettojr]

Dong didn't you agree with B a few months back and say the white leds are bad for corals??? I know B is a proponent of not using white leds also.

 

[LoveTheReef]

It is well studied, ATI, Ecotech, AI, Maxspect, Kessil (intergrated), Vertex, Giesemann, ReefBreeder, Cheapo Chinese LED all have white LED in them.

So ... if I "claim" to have "studied", and put white leds in my new fixture, that means it's a fact? did they study with non white leds? If yes, could you provide link to their process and results please?

And no, I'm not attacking any fixture. I'm of the opinion that one can grow corals under any of the above mentioned lights and more.

Especially you Dong! I know you are a magician when it comes to corals (and I say that in a positive way).

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[dz6t]

In terms of white light via RGB color mixing, the spectrum reading by machine is....(insert drum roll)... three narrow band of Red, Green and Blue.

 

[dz6t]

Dong didn't you agree with B a few months back and say the white leds are bad for corals??? I know B is a proponent of not using white leds also.

White LED is not BAD for coral, too much white is bad for coral. So please don't make it so absolute. Also take it easy and this is a hobby.

 

[LoveTheReef]

Since you are a vendor for Pac Sun, I guess it is more appropriate to carry further discussion off line.
I said "complicated stuff" because I am too lazy to write out a lengthy post, and that is all. Please do not take it any other way.

I sell other lights as well. Just because I personally find best bang for the buck in PacificSun doesn't make me anymore affiliated with them than it does with Ecotech or AI or ATI. I own a store and we sell all fixtures... I have sold just as many Ecotech and ATI fixtures as I have PacificSun.

Just because I like something doesn't mean my customers have to.

I'm sorry if you're taking this the wrong way. I was just trying to learn the basis behind your theory.

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[dz6t]

BTW, I am waiting for Riverrat to post, three of you are always together. OK, please drink a beer and take it lightly, put a smile on your face when you hit the keyboard.

 

[dz6t]

I sell other lights as well. Just because I personally find best bang for the buck in PacificSun doesn't make me anymore affiliated with them than it does with Ecotech or AI or ATI. I own a store and we sell all fixtures... I have sold just as many Ecotech and ATI fixtures as I have PacificSun.

Just because I like something doesn't mean my customers have to.

I'm sorry if you're taking this the wrong way. I was just trying to learn the basis behind your theory.

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I am glad you say that. Yes, it is important to learn what is the best for customers, friends etc. Both their wallet and their coral.

 

[dz6t]

I will highly recommend Ecotech's new generation Radion, you all know I am not a big fan of their first gen LED, but hey, they improved.

 

[LoveTheReef]

In terms of white light via RGB color mixing, the spectrum reading by machine is....(insert drum roll)... three narrow band of Red, Green and Blue.

Wouldn't it depend on how many different shades of Reds, Blues, Violets, and Greens are there? Or would it just be 3 spikes and that's it regardless of the composition? And again, I'm just asking if you have spectral graphs of fixtures using white leds and fixtures not using white leds. To clarify, I'm not disagreeing with you -- all I'm asking is the basis of your opinion that blending colors is bad for corals.

BTW, I am waiting for Riverrat to post, three of you are always together. OK, please drink a beer and take it lightly, put a smile on your face when you hit the keyboard.

You don't need to get so defensive ... this is a hobby Just like you have your opinions, so do others. Just because a few people disagree with you doesn't mean we're in cahoot.

I am glad you say that. Yes, it is important to learn what is the best for customers, friends etc. Both their wallet and their coral.

I could not agree more! See! We do agree!

I will highly recommend Ecotech's new generation Radion, you all know I am not a big fan of their first gen LED, but hey, they improved.

Same here! We agree again!

 

[dz6t]

It is three spike of RGB.
Actually, one of the fresh water LED manufacture do publish the spectrum graph of their RBG LED channel (to generate various shades of white), it is three narrow peaks.

 

[dz6t]

Here, from Wiki,
please scroll down to RBG and Phosphor-based LEDs
http://en.wikipedia.org/wiki/Light-emitting_diode

There are three main methods of mixing colors to produce white light from an LED:
blue LED + green LED + red LED (color mixing; can be used as backlighting for displays)


near-UV or UV LED + RGB phosphor (an LED producing light with a wavelength shorter than blue's is used to excite an RGB phosphor)
blue LED + yellow phosphor (two complementary colors combine to form white light; more efficient than first two methods and more commonly used)[9

 

[wdebenedettojr]

BTW, I am waiting for Riverrat to post, three of you are always together. OK, please drink a beer and take it lightly, put a smile on your face when you hit the keyboard.

No dong I think the problem I know I have with you and I'm sure my opinion is shared with others is that every time an LED thread comes up you start picking at fixtures you don't like. You lighten up. I stated my opinion about the fixture I personally use and you jumped all over my back about it and it not having whites. There are many ways to grow corals dong and what frustrates me the most about you is that you come on her and belittle people when they ask you questions about your experience when they ask for scientific proof to back your statements. Don't come on here and sound like a scientist and then when someone asks you to provide proof you say "it's to complicated". Your right dong halides are the best to grow corals!!!! I agree with you.

People like you are the main reason I stopped using the BRS years ago. Just trolling the forums poking at people's opinion. You don't like my opinion that's fine and dandy but don't call people out and then when they ask for proof you say it's to complicated. Leaves a bad taste in people's mouths my friend. I don't understand how you repeatedly do this and the moderators/BOD don't step in. Not to mention you are basically running a store out of your basement without being classified as a vendor and every month you advertise that months corals. Seems like it hurts the clubs paid vendors.

 

[dz6t]

hmmmm, read post #56 and #45

 

[dz6t]

I don't understand how you repeatedly do this and the moderators/BOD don't step in. Not to mention you are basically running a store out of your basement without being classified as a vendor and every month you advertise that months corals. Seems like it hurts the clubs paid vendors.

Since you brought this up, I will like to remind you that protecting the natural reef resources is in BRS's mission, by aquaculturing coral, we help reducing the burden on the natural reef and make this hobby less rely of wild coral collection.
I am selling $5 frags only to BRS members to cover my cost. I hope more people can do that.
By the way, I never meet you and I hope to meet you in person some day. You are welcome to drop by to see my mini coral farm.

 

[maximo]

Now now everyone! I love seeing that everyone has such a passion for this hobby however we may show it! This thread is starting I get off topic! Can we all try to remember that corals need a lot of time to slowly acclimate to led fixtures! I personally have burned my corals when I switched to my radion gen 3 pros by playing with them! And guess what, the coralline did not and I repeat DID NOT die! All my sps bleached very fast and a algae bloom occurred! I agree that more lighting for a tank of this size may still be needed but it needs to be achieved over time! I never put a new coral as close as I can to a light when I introduce it! I place it low and out of direct light and move it up over the course of two weeks! To have an additional channel of less just for whites is too excessive especially when first starting with the light! It's almost as if the light puts the coral through a new tank cycle when it's introduced! Ps I'm not trying to argue with anyone!!


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