Calling out to Weezard for LED advice

[khyberkitsune]

"However, you are dead wrong on plant growth. Plant bulk is directly related to how much photosynthesis takes place"

Know I know you're just dead wrong. Grow tomatoes under pure red light (which provides the greatest quantity of photosynthesis) and get back to me on your results. The kind people over at greenpinelane already went through this about half a dozen times, over and over again. YOU NEED BLUE LIGHT FOR BULK. Again, this is why metal halide and CMH are used in large-scale commercial horticultural operations.

Want to place a bet on who is right and who is wrong? I do this GLOBALLY for a living. If I were wrong about this, I'd have been sued by many LARGE global corporations A LONG TIME AGO, and not only that but those corporations with on-staff PhDs in plant biology would have outed me LONG ago. Instead, I keep getting calls asking "When is your new phosphor blend going to be available! when is your new diode emitter design going to be finished? have you finished research on your new HID light? Here's a bonus reward for improving our operations and productivity!"

Yea, while all those scientific studies you point out are nice, the plain and simple tested proven fact for the past 50 years is YOU NEED BLUE LIGHT, and in FAR greater quantities than what NASA determined originally.

As for the picture - How convenient? Not my fault NASA updates their pages fairly frequently with different images! What, you expect a constantly-updating mission to keep the same page, images, or even text? I most certainly hope you don't, that would be rather fallacious.

[Weezard]

Aloha Thepaan
Aloha Khyberkitsune

You are both bringing useful information here.
Mahalo!

I think, "What we have here is a failure to communicate."
Theory and practice, yah?
Bottom line?
We have similar goals.:greenthumb:

Contention can breed information, but I think co-operation will get us farther, faster.

Ego banging is always a waste of time n energy
You are both intelligent and articulate writers.
You both have valid positions on most issues.
"Add flexibility to certainty and solid facts will provide a platform for fruitful debate." -Aargon Zark

In Hawaiian, this is all summed with one word

Kokua!

We will all profit from mutual respect.

Alo Ha, gentlemen.

Weezard

[thepaan]

I totally hear you Weezard. I hope somone can benefit from the discussion we have had.

Khyberkitsune, I'm not saying I won't change my mind but, as yet, I suppose we shall agree to disagree.

I apologize if I offend. I know I'm easily a hot-head but, in this case, It is not my intention and I've made a concious effort to keep all statements relative to discussion. (You should have seen my previous post before I edited it :P)

Anyway, in the fashion of Weezard;

Mahalo.

[mrnobody]

"Show me some evidence and I'll consider changing my stance. Metal Halide lamps are recommended for the amount of light they give off. The spectral content is leveraged only as a marketing ploy to discredit High Pressure Sodium lamps. And, it may be true that MH is better than HPS but at that point we are talking about blue light compared to orange light."

A CD spectrometer

Even with basis tests you can see that a Metal halide as a more complete spectrum hence why plants like them more. As far as I can see this whole thread has been centrered around the blue/red ratio. surely just growing under red/blue can only be supplemental in the long term. Yes it works, yes blue lights Veg lovely plants. Its fact now. The mix is very relevent as the plants thrive on both red and blue through all stages of growth, just like outdoor green. There is also a lot of research to show that the important characteristics of the finished product are better when treated with more of the light we cannot see. At the very end of the visible light spectrum. There is also a lot to be said about moonlight on a plants life cycle too. AS professional growers of commercial crops know to sow when the moon is high as the gravity as an effect on root development. Its these factors i think that are more important than a red/blue mix. WE should be looking towards continuos spectrum lighting.

[Weezard]

"WE should be looking towards continuos spectrum lighting. ":S2:

Well, YOU, go right ahead my good man.:thumbsup:

You might be on to something.

My take?
Been dere,
Done dat.
Over it.

I find 150W. dichroic, efficient and sufficient to my needs.:jointsmile:
There is so little "room for improvement" at this point, that motivation is severely lacking.

In Pidgin: Why bodda?

In udder words:
Show me sumpin a'ight?

Aloha,
Weezard

[demoreal]

This thread is really nice.
ummm, thats all.

[Weezard]

This thread is really nice.
ummm, thats all.

Das genug!
Plenty, even.:jointsmile:

Gives me da warm fuzzies to hear that you got sumpin' from it.

Was fun, and useful when we did it.
The commercial led builders are catching on/up, fast.

Guess we're gonna have to find anudder bleeding edge to surf.

Aloha Y'all

Weezard

[Weezard]

:bump2:

Why?
Why not?

Weeze.

[Slevinkal]

Works for me :thumbsup:

[mx4intx]

Anyone have any suggestions for a quick cheap way to safely power 12 ledengin 5 watters? 4 blue 3.6Vf, 4 red 2.5Vf, 4 deep red 2.8Vf. They are all 1000mA.

I was thinking 3 series strings in parallel to the PSU? But I am not sure how to do the circuit calcs. The online calcs wont let you mix and match that way.