Modern LED scrubber light

Thanks for the info

Rygh I have seen some info about chlorophyll c and d but never anything about

the spectrum they like. ????

I could not find any waveforms on that either.
But found this:

Carotenoids and chlorophyll b absorb some of the energy in the green wavelength. Why not so much in the orange and yellow wavelengths?
Both chlorophylls also absorb in the orange-red end of the spectrum (with longer wavelengths and lower energy). The origins of photosynthetic organisms in the sea may account for this. Shorter wavelengths (with more energy) do not penetrate much below 5 meters deep in sea water. The ability to absorb some energy from the longer (hence more penetrating) wavelengths might have been an advantage to early photosynthetic algae that were not able to be in the upper (photic) zone of the sea all the time.

GREAT INFO!!


based on what your saying which one do you think I should go for?

Its all abit confusing to me. I kind of understand but not really lol.

based on the graphs blue seems to be a bigger range including purple? and orange is incorperated as well with low reds being good to with a high spike in mid blue and mid red.

My options are dual, tri + quad and in flowering or vegative.

still my thoughts are to go quad and vegative? maybe add some purple, deleting the white for purple and half white/purple, they can make what I want. with 50w at my disposal :)

Any thoughts guys

Confusing to all of us.

I would suggest the "flowering", because the vegetive skips 660nm, (chlorophyll-A red)
Beyond that, not sure.
Seem like ideal is to cover 400-500, 620, 660.
With the ratios they are quoting, it is almost all red.
Another issue is LED accuracy. The actual spectrum on an LED can vary quite a bit from "standard advertised".

So browsing last night, I noticed a company doing something with algae bio-oil.
(Sorry, forgot to save the link)
They said they did a lot of research on lighting, and they were using LEDs for lighting.
This was for free-floating algae, not what we want, but close.
I noticed a 4-1 ratio, 4 red for every 1 blue.
Impossible to tell exact spectrum of course.

UPDATE ON MY BUILD:
Well, I am still fighting the dark-crud. I am cleaning every 3 days, but the crud still seems to be winning.
The problem is, I just built a small test ATS, not the real deal.
It is effectively 30 sq in, single sided, for a 65G fairly loaded well fed tank.
So it cannot keep up.
Plus, there is a flow problem. My actual flow is a LOT less than I expected from the pump rating.

The corals do seem a bit happier though. More open. My leather has been growing like a weed. And I notice more tiny pods in the water.
Nitrates/phosphates still read 0, always have.
But still plenty of short-hair algae in the main tank.
So for what it does, I would say it is a partial success.
Enough to spend the effort to build a full size one. Unfortunately, with a separate pump.
Someday. This is Valentines day weekend. "Honey, I need to spend all day in the garage building something to grow more algae". Hmm. No.

I notice you did not have the prices in the list you posted. Why I mention it from my research so far

leds are very expensive when the tech is pushed to produce wavelengths toward uv (blue) or infrared (red)

So I would be suspect if there is not a considerable increase in cost when high red (660) is being used

(EX. of the reds I purchased there is increase of over 20% from normal red, 630nm, to deep red, 660nm)

especially considering that there is more red leds than any other color ( and I have seen higher cost differences)

I also noticed that as time goes by there is an increase in multi band led panels ( ironic that the dope smokers

are doing so much to increase the experimental knowledge about led grow lights) which include whites. I assume

it is because there is still a need for a broad spectrum.

Hope this helps.

I do not see a cost difference where I bought mine. ledsupply.com
All the colors, and non-sorted white, are the same price.
Only the high lumen specially sorted whites are more.
Both luxeon and cree.
That includes the royal-blue, but they do not have a deep red.
Also, while pretty good pricing, not exactly a major wholesaler type.

rygh, your comments lead me to what I think. to some extent, is the crux of the problem.

The normal blues, even royal blue, might not be low enough but even more importantly the

reds are not high enough.

Ex a rebel royal blue (440nm to 460nm) or a Cree royal blue(450 to 465) still are a little off of what is needed

for chlorophyll a (also keeping in mind that the led is predominately in the middle region of of those ranges i.e. has a sharp peak)

Also more importantly, for at least the reason that there are on several orders of magnitude more reds, that

most red leds are in the low 600nm range. This also misses to some extent the peak red levels of chlorophyll a.

The deep red I have on order is 661nm. I am far from an expert and this is only how I am interpreting the info I have seen so far.

hope this helps

I noticed that the temp that leds run at can shift the wavelength produced. Anyone know in which direction?

Interesting. Maybe that is why the normal LEDs do not succeed so well.
Interesting product: http://www.ledengin.com/products/5wLZ/LZ1-00R205.pdf
High power, deep red, specifically for clorphyll-A