Growing Under White LED, Anyone Else Doing This?

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SnotBoogie

Well-Known Member
almost all reds you see in non-horticultural lights will NOT be 660nm.

They will be somewhere around 630nm.

some of the light given out by a 660nm is not visible to the human eye and therefore pointless in a bulb designed for your eye's benefit, So i'm pretty sure using them would be needlessly inefficient.


Also just to be clear for others reading the thread, there is no "white wavelength", as alongtimegrower said white is made up of different colors. :)

Flora, I'd also guess that your UFO has 630's in it simply because they are likely cheaper.
 
PetFlora

PetFlora

Well-Known Member
^^ Probably, alas, the mfg will not release such confidential info lol

Just added the ufo. Also, eliminated the turkey roasting hood- failed experiment as the globe bases are too long.

Be taking a pic in a few
 
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alongtimegrower

Member
PetFlora,

Don't dispair...

The basic red LED are centered around the 623nm, with range upto +/- 20 nm to either around the peak. Plants will use this light.
If you go look at some of the grow lights out there, they are advertising as many as 11 different types of LED colors. In reality they are producing some type of white light when all mixed
In the red end of the spectrum they are adding orange, red-orange, red and deep red.

A red accent type bulb with ~250 Lumen will be very bright for plants and would start to reach into the deep red.

The real benefit of white LED of any color temperature is that only the red end of the light may need supplemented with extra red or deep red to get desired results.

Over time, I've known a few folks who only used MH for flowering and it worked well for them. One of them swore by MH only.

I've seen your pics and white LED is working well... :)
 
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RainerRocks

Active Member
Sir.Ganga said:
I was under the assumption(from what little reading I have done)that using only white LED's is too narrow of a bandwidth for their needs. I am just starting to play with led's myself. Definetly a different game when you can dial in color spectrum.


White led's are not the same spectrum as T-5's, high output flouro's, eventhough they look white they represent a fuller spectrum.

Please correct me if this is wrong as I need info also?
Click to expand...
To see which part of the spectrum CW..NW and WW LED's cover check out this website. Just drag and drop the LED you want and see the spectrum change.

http://www.buildmyled.com/custom-led-strip/

I'll be using crees solderless white LED's but there's a problem with their whites. The range is huge so when I use the site buildmyled . com I just find the middle of Crees range and use that number to get an idea of where these white LED's fall in the spectrum. .

Their WW is 2600K - 3700k

Their NW is 3700 - 5000k

Their CW is 5000 - 8300k

There are better whites (orsam) out there but I need solderless so I have to stick with the CREEs white LED's.

My build will be 8 white (combo of whites) Led's with a (2 ) R. Blue (1) Cyan (2 ) DR (1) UV (1) FR for a total
of 15 in a Merkaba design.
 
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RainerRocks

Active Member
I'm also going to have a timer with certain spectrums to light at different times.

Will try to mimic sunlight at ..

6am - 8am

8am - 10am

10am - 2pm (Full spectrum here)

2pm - 4pm

4pm - 6pm

Or I might do

6am - 9am

9am - 3pm (Full spectrum here)

3pm - 6pm
 
PetFlora

PetFlora

Well-Known Member
RainerRocks said:
I'm also going to have a timer with certain spectrums to light at different times.

Will try to mimic sunlight at ..

6am - 8am

8am - 10am

10am - 2pm (Full spectrum here)

2pm - 4pm

4pm - 6pm

Or I might do

6am - 9am

9am - 3pm (Full spectrum here)

3pm - 6pm
Click to expand...
Modify according to strain origin
 
guod

guod

Well-Known Member
I'll be using crees solderless white LED's but there's a problem with their whites. The range is huge so when I use the site buildmyled . com I just find the middle of Crees range and use that number to get an idea of where these white LED's fall in the spectrum. .

Their WW is 2600K - 3700k

Their NW is 3700 - 5000k

Their CW is 5000 - 8300k
Click to expand...
a white led has always only one kelvin-number not a range!
which kelvin you got is bin related.
take look at side 18 to see what i mean.

http://www.cree.com/~/media/Files/Cree/LED Components and Modules/XLamp/Data and Binning/XLampXPBL.pdf
 
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RainerRocks

Active Member
Hey goud

I'm learning here ... I can't open that link.


Anyway...why does rapid have them listed as 2600k-3700k and why not just list so I know kelvin number ?

So any white led has it's own K but they will be different and any where in the range according to bin.

How am I suppose to know what I'm getting if it's not listed?


PS: Edit

OK got link to open and don't see WW XPGWHT-L1-0000-00EE7 that's on rapid.

Help me here..



guod said:
a white led has always only one kelvin-number not a range!
which kelvin you got is bin related.
take look at side 18 to see what i mean.

http://www.cree.com/~/media/Files/Cree/LED Components and Modules/XLamp/Data and Binning/XLampXPBL.pdf
Click to expand...
 
S

SnotBoogie

Well-Known Member
That is the XP-C spec sheet.

1. Go to cree website


2. Find "XP-G series" (the first 3 letters of the code)

3. open the two files under "documentation" - One is called something like "product family information" - telling you properties of the diode - and the other is called "binning and labelling" - telling you how to understand the codes they are labelled with.

4. Smoke a spliff and read them both carefully! The answer to your question is easily found.


edit: oh and while were talking about cree E7 kits, let me suggest looking at the XT-E E7 warm whites (read the stuff above and then you will know what im talking about!), i'm actually considering them myself for my next project.

edit2: Flora, $35 seems awfully expensive for only 6 watts. Are you dead-set on a screw in solution?
 
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alongtimegrower

Member
RainerRocks,

Thank you for the pointer to the buildmyled site, pretty cool.
My best guess is they are using the Philips Rebel and Rebel ES line of discrete LEDS for their product, based upon colors and outputs.
Best part they are willing to calculate the PAR of the light your buying. very valuable info. :)

It allowed me fill in my list of mmol/s of 1000 Lumen list of different types of light...

PAR Values in mmol/s of 1000 Lumens of common light sources:

Calculated for a sylvania lighting FAQ sheet for 400 - 800 nm:

bright sunlight and blue sky: 24 mmol/s
MH: 13 mmol/s
HPS: 13 mmol/s
incandescent: 36 mmol/s
5000K fluorescent: 13 mmol/s

For LEDs I calculated these numbers using the buildmyled site (400 - 750 nm):
(IMO, these numbers are optimum values... I am using a lesser value for my 5000K application 12.5 mmol/s for 1000 l.)

LED 5000k: 14 mmol/s
LED 3000K: 15 mmol/s
LED 2700K: 15 mmol/s
LED 4000K: 14 mmol/s
LEd Ultra_Violet (~405 nm): 2837 mmol/s
LED Royal Blue (~450 nm): 98 mmol/s
LED Blue (~470 nm): 67 mmol/s
LED Cyan (~505 nm): 13 mmol/s
LED Green (~525 nm): 8 mmol/s
LED Amber (~ 590 nm): 10 mmol/s
LED Orange (~ 615 nm): 21 mmol/s
LED red (~625 nm): 27 mmol/s
LED deep red (650 - 470 nm): 80mmol/s

Again, All of these values are for 1000 Lumens of type of light, They are an average value, and bested used to evaluate and plan.
To get the most out of light really depends upon the distribution of light, how it is delivered, its quality, its intensity, amount of light, and many other things...

I did not calculate out Far Red. IMO and now experience it is not really necessary unless you are using it for special applications to manipulate the plant with end of day treatments.
 
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alongtimegrower

Member
A couple of Pics...

The bag seed sativa has grown into a LED again...

Sativa_Growing_into_LED_again_D14.jpg

This is a closer pic of the auto-plant with its young buds at day 14 of flowering. It had initial pistil development two weeks ago when I installed the white/deep red lamps...

Auto_plant_with_young Buds_Day_14.jpg
 
PSUAGRO.

PSUAGRO.

Well-Known Member
How focused is the beam pattern on those Philips ambient 3000k flood bulbs??I love what you guys are doing with the screw on leds.....gives allot of options and experimentation/nice job btw^^
 
C

cannabiscultivation

Active Member
PSUAGRO. said:
How focused is the beam pattern on those Philips ambient 3000k flood bulbs??I love what you guys are doing with the screw on leds.....gives allot of options and experimentation/nice job btw^^
Click to expand...
my energetic 17 wat LEDs are really focused...to the point I raise them just to spread out the light a little more.
 
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