Calling out to Weezard for LED advice

[waterdog]

Hello Weeze ! I want to apologise for jumping on your back a few years back when I first came to this site... You were saying how you had finally equaled the sun indoors and I responded you can never get the same yields indoors as out and we had a few other things to say before it was over also. I have matured as a forum browser and I really want to give you a very heartfelt, "im sorry" !!!! I am now also growing indoors and want to say I have much respect for you and your wisdom.. Peace and may your buds be large and plentiful !!!

Weeze .......? are u there ?

[Weezard]

Right behind ya brah.
Why would you wonder?

Sent you a private message via reputation.
Guess you missed it.

Apology accepted.
Mahalo fo' dat. I had completely forgotten.
No worry, I understood your position.
Did not see it as a personal attack.
Saw it as a reaction to unexpected results.
( I get a lot of that)

Didn't believe it myself when I first started reading about LED growing.
That's why I had to try it in the first place.
The science was sound, but it had a ring of "too good to be true" about it.

In retrospect, it should have been obvious to me because the sun is such a harsh master.
At noon, in the tropics solar exposure exceeds 91K Lux.
Cannabis stops growing at ~90. unless you supplement CO2.
Even then it pushes transpiration to capacity.
Meanwhile, the UV b-c is frying off capitate glands, overheating leaves and stem, heating and drying roots near the surface, yadda yadda.
Homeless plants have a hard life here.

So, I shield them from harmful wavelengths.
Give them sufficient, (but not too much), light energy at the most efficient wavelengths.
Feed them appropriately, insure an ample supply of aerated water and a pest free home.

With all that in mind.
My results were predictable.

So, fuggedaboudit!
There was no offence.

Aloha nui, an' how does your garden grow?

Wee 'zard

[WeayLay]

Nothing like a respectful apology. I love the community here, so respectful and willing to help. Either way, I think I'm going to post here now, instead of my LED thread, at least until I start building the box and post up the grow log.

in order to lower costs, I'm only going with half the LED's for the single rubbermaid grow box. Should be around 22w, but I'll probably put in a decent powered CFL to make up for the rest of the spectrum. I'm pretty sure 22W will do fine, Pinstripe over at ICmag got 38g from 22W in a PC box (Anyone that respects any grow should check that out, crazy micro grow, probably the best documented one), and I'm going to be using his technique (LST) and further improving it with a SCROG.
The LED's and the drivers are going to be 100 shipped. I've been looking at Phillips Lumileds Rebel LED's, specifically three of them, mounted on a MCPCB (called Tri-star). I'm going to have 1 royal blue and two far reds on each tri-star, what do you guys think?

[Marijuanadonna]

Hey guys, first post here! I'm trying to find a good strain that grows well under LED's in a SCROG. Any suggestions? Thanks!

[Weezard]

Sure!
White Widow loves leds and is easy to grow.

Aloha,
Wee 'zard

[Marijuanadonna]

Thanks Weezard! I've grown White label white widow under a 400w hps and was very satisfied with the results. Any suggestions on a seed bank? Seems like the white widow strain is different depending on the breeder.

[sx646522]

Aloha, Weeze. Different forums, same t'ings, eh? :thumbsup:

Thanks Weezard! I've grown White label white widow under a 400w hps and was very satisfied with the results. Any suggestions on a seed bank? Seems like the white widow strain is different depending on the breeder.

Instead of a white label, try the 'black label' - specifically, the original WW as bred by MNS. Used to have some in my garden, not the biggest producer, but you definitely won't be disappointed. Can't link to it due to rules; just search for the following:

"Black Widow - Mr. Nice seedbank and research - Strains"

Aged 18 years now, and smooth as silk. Girls that old are the perfect age...or so they tell me.


Cheers,

-SX

[Marijuanadonna]

Thanks SX. I've recently been looking at Dinofem's Critical+. It seems perfect: very high yields, potent, and tasty. Just don't know how it will do under LED lighting. Has anyone grown this strain under LED's?

[warrior #113]

Thanks SX. I've recently been looking at Dinofem's Critical+. It seems perfect: very high yields, potent, and tasty. Just don't know how it will do under LED lighting. Has anyone grown this strain under LED's?

I've seen this exact strain grown under white and deep red leds only with amazing results. Best buds I've ever seen anywhere actually. They were the size of my calf.

They guy made a led fixture using 12 neutral white 3w, 12 deep red 660nm 3w and 4 630nm red 3w. I've never seen buds this nice before. Critical is a good heavy duty strain with big yields.

@anyone,
Could someone please tell me the reason NOT to use multi-chip emitters? I see this talk on here worrying about if a led is single or multi-chip. From everything I've seen a multi-chip emitter will run more efficiently giving you more lumens/W.

There are pure white leds out there that are using 100w 100 chip single led emitters in a dense matrix. They pack a huge punch and people are growing straight up trees with them. Ya know, eventually up the chain, it would not make any sense to have single chip/die emitters in the higher wattage territory. I don't understand why this wouldn't apply for lower wattage leds as well.

Why would a person be worse off to use a 3w 3 chip led vs a single chip 3w led? I just don't get it. The datasheets say the 3w 3chip leds put out more lumens/W.

Could someone please explain what I am missing about this issue?

[Weezard]

"The datasheets say the 3w 3chip leds put out more lumens/W."

The answer is in the question.

The 15W Ledengin emitters are actually 4 X 5W. dies.
The use about 3W. per die and should last a very long time with decent heat management.
They put out more photons because they are kept in the "sweet-spot" of lumens per Watt.

The epoxy lens makes them as close to "point source" as the need to be.
And they cost less to manufacture than high power, single die emitters.
(They get fewer defective chips per wafer after sputtering).

Bottom line?
Photons per watt per dollar, yah?

Havin' fun yet?

Aloha,
Weeze