New thread: LED info only for ATS's only....

[MidwesternTexan]

Hello all:

Cut to the chase:

I'm looking for sites:ebay/amazon-
that has the grow lights that are both low $$, and have been tried, and
DO GROW massive amounts on a broken in ATS.

I currently have CFL's with reflectors and want to upgrade to the
red, or mostly red/some blue LED's-

I've seen the big sheets- vs. the larger central LED's with reflectors.

Any help is appreciated.

TIA,
Todd

 

[MidwesternTexan]

So, I'm assuming no one who has an ATS, and grow LED's has read this yet?

 

[ca1ore]

I use a pair of ReefBreeders Fuge lights and they've worked well; however, they neither meet you requirements for having been bought off ebay/amazon nor were they particularly cheap.

 

[Subsea]

Why have you decided that a red led is an upgrade from CFL? Does photosynthesis happen in only one band width of color spectrum?


I use a 23W CFL that is 5000 Kelvin color reduction from Home Depot under the product name "ecoSmart". It is made in China where standards for color spectrum are not regularly reported.

 

[outy]

Many of us have recently bought the red/blue grow floodlights ranging from 10w to 50w and most all of us have had success.

 

[Subsea]

http://www.htgsupply.com/Product-LED-Spotlight-Bulb-TriBand-Spectrum---ONE

This link is a large greenhouse supplier? They developed their own LED grow lights because of dissatisfaction with Chinese manufactures.

With respect to buying cheap, I will give you a quote on my brothers business website,
"Quality is not expensive, it is priceless".

 

[outy]

http://www.htgsupply.com/Product-LED-Spotlight-Bulb-TriBand-Spectrum---ONE

This link is a large greenhouse supplier? They developed their own LED grow lights because of dissatisfaction with Chinese manufactures.

With respect to buying cheap, I will give you a quote on my brothers business website,
"Quality is not expensive, it is priceless".

Very few people if any have had success with that type bulb.

Generally speaking to dim and not enough power to grow much.

We actually tell people to avoid this bulb for an ATS.

 

[Subsea]

Very few people if any have had success with that type bulb.

Generally speaking to dim and not enough power to grow much.

We actually tell people to avoid this bulb for an ATS.

The reason that I included the link is because in the technical discussion section of the website, specific functions of growth are assigned to specific color spectrum.


With respect to ATS, what color spectrum and in what ratio do you recommend.

 

[outy]

With respect to ATS, what color spectrum and in what ratio do you recommend.

Red 625-660nm Which are actually Floyds

 

[Subsea]

Do you run red led only?

 

[outy]

Do you run red led only?

No I have a mix BUT Blue addition has shown no gain over red alone. [per Floyd]

Most red leds however come with x amount of blue leds added to the mix.

 

[oreo57]

Look at "full spectrum" (stupid name) 3W chips..
Royal blue diodes w/ a broad spectrum deep red phosphor..

 

[outy]

Look at "full spectrum" (stupid name) 3W chips..
Royal blue diodes w/ a broad spectrum deep red phosphor..

Does not matter what that chart states.

They are not recommended.


We are growing algae


Algae likes the red the best, and blue has not shown to help



The difference is small but it is there.

 

[oreo57]

They are not recommended.

not according to these people:

A 3:1 red: blue LED light combination was found to produce the most daily biomass (178 mg dry algae/liter-day versus 88 in fluorescent) in the 2 liter PBR. The red-blue light also produced the highest lipid content (7g lipids/100 g dry biomass versus 1g/100g for fluorescent).

http://www3.aiche.org/proceedings/Abstract.aspx?PaperID=312780

worse:

This indicated that change in the wavelength of light influenced the growth rate of Tetraselmis sp. and Nannochloropsis sp. during 18 days of cultivation due to chlorophyll ‘a’ which is at a maximum at two points (430 and 662 nm) which influenced the grow of biomass. The blue light wavelength was around 420-450 nm and the red light wavelength was around 660-700 nm. Thus the blue light wavelength tends to be narrower and thus closer to the chlorophyll ‘a’ wavelength requirement. The author suggested that blue light condition was a better medium than red light in cultivation of Tetraselmis sp. and Nannochloropsis sp. Ruyters [22] stated that blue light enhanced in the regulation of activation of enzymes and gene transcription. When cell was damaged by red light, the blue light allows the cell to repair by exposure to low intensity of blue light. The growth rate and biomass production of marine microalgae were related to the type of light wavelength [23]. In addition, Madiha [24] reported the blue LED allows the light intensity to penetration deep into the batch culture thus enhanced the doubling of microalgae and cell density increased faster.

https://www.google.com/url?sa=t&rct...A8mPTiPWg&sig2=xZRFj2x3HDG9BVW6LIc54Q&cad=rja

 

[Subsea]

Oreo,

I read both links in post #14. The first link used a fresh water micro algae. The recommendation was to use a ratio of 3/1 of red to blue. The second link studied two different marine phytoplankton. The testing criteria used only one LED color at a time. Blue was shown to grow more biomass.

From those two links, I see no substantiation that all red is best.

 

[oreo57]

Oreo,

I read both links in post #14. The first link used a fresh water micro algae. The recommendation was to use a ratio of 3/1 of red to blue. The second link studied two different marine phytoplankton. The testing criteria used only one LED color at a time. Blue was shown to grow more biomass.

From those two links, I see no substantiation that all red is best.

right, all red is not shown to be best.. my point and why the "full spectrum" (royal blue plus broad spectrum red phosphor) LEd's should work just fine..
Have yet to read any study (i.e controlled) that favored red only for anything photosynthetic, well normal photosynthetic things, not things like photosynthetic bacteria ...
Though a lot of things ARE species specific.. anything is possible..
as a side note the more energetic blue could hinder photosynthesis at large output levels..and as plants go, red is "easier" to capture...

 

[outy]

right, all red is not shown to be best....

Actually it has been done. Its obvious you have not read the thread above.

that's why I stated my source as Floyd who is the person responsible for helping everyone here, and gives detailed instructions on how to build lights for ATS.

Blue is not needed

 

[oreo57]

The difference is small..............

Not a very convincing argument and who is Floyd??
Point is it probably matters little that one uses blue based diodes w/ a broad spectrum red (NOT Blue plus red diodes) and I suspect you will not see any difference and possibly
a benefit. did Floyd TRY "full spectrum" LEd's??

 

[outy]

Floyds recommendations

Here is my recommendation for LED lighting of a waterfall algae scrubber screen:

This is for a double-sided screen using Philips Luxeon ES 3W Deep Red 660nm LEDs without lenses (120-140 degree) running at 700mA at 2-3" from the screen to LED

Minimum coverage: One LED on each side of every 8 sq in of screen
Maximum coverage: One LED on each side of every 4 sq in of screen

 

[outy]

who is Floyd??

Lets say a founding father of ATS who helps juts about everyone on the topic.


read the 300 pages in the first sticky at the top of this page.


Santa Monica scubbers also has stated verbatim "red is best"


http://reefcentral.com/forums/showthread.php?t=1977420&page=296