White LEDs

[DiscusHeckel]

There is a very long thread about white LEDs being harmful/not needed for reef tanks somewhere in this section. I simply can't find it. If you saved its link, would you mind sharing it please?

Thanks

 

[Uncle99]

I’d love to see that post as well.
Following.

 

[kharmaguru]

Is it this one?

Open letter to the LED industry

 

[DiscusHeckel]

I believe this is the one. Thank you very much.

 

[oreo57]

First off CRI is based on a reference standard.
6500k daylight and something like 2700k tungsten.
The k temp of the light is what one uses to pick which standard will be the reference point.

Lights like 4500k-ish of bluer will be measured against 6500k daylight.
Soo getting 100cri @ 10,000k is hard if not impossible (never say never since cri uses only 8 color swatches R1-R8 )
Case in point natural sunlight @ 10000k CRI

This is in reference to the link posted above.

There are dozens of threads about blue vs white leds scattered across various coral forums and "need" is a personal choice
for more than just growth.

BTW.. CRI is outdated and there are currently plenty of high CRI 6500k white chips available (sometimes, not THE most requested chip in the "real world")

Let's see IF this gets censored here..
Please substitute "photons" for "power"

How Much White Light Do Corals Need? - SeaLife Planet

Growing healthy corals isn't as straightforward as it seems. They require ideal conditions that include pristine water quality, stable temperatures, and the

sealifeplanet.com

As white light travels through water, some of the other color frequencies are lost through refraction, reflection, and dispersal.

Blue light, though, travels at the highest frequency, meaning it can penetrate down to coral without losing power.

Therefore, if you’re growing deep-water corals, we recommend using a combination of both white and blue LED lights. If you’re growing shallow-water corals, though, you should be able to make do with standard white LEDs, halides, or fluorescent lights.

 

[kharmaguru]

Let's see IF this gets censored here..

Quoting other sites is no longer an issue AFAIK.

 

[oreo57]

Well let's test that hypotheses.

Is there any real benefit to full spectrum lighting?

Blue Plus is not full spectrum. You do know that right? Coral plus or aquablue special are closer to gull spectrum. Fair enough . Coral plus. Not even close to full spectrum daylight. Seems to be missing HUGE chunks of " colors". These are from ati btw. Since most people don' t like the...

www.reef2reef.com

Looks good. r2r was a big no no..

 

[kharmaguru]

Well let's test that hypotheses.

Is there any real benefit to full spectrum lighting?

Blue Plus is not full spectrum. You do know that right? Coral plus or aquablue special are closer to gull spectrum. Fair enough . Coral plus. Not even close to full spectrum daylight. Seems to be missing HUGE chunks of " colors". These are from ati btw. Since most people don' t like the...

www.reef2reef.com

Looks good. r2r was a big no no..

I did have a DM with John a while back regarding that and he felt it was fine to link R2R. The simple truth is if you know about RC you're 99% likely to know about R2R. We are part of a larger community, ignoring that is just silly.