/sci/ - Science & Math

[Anonymous No.3396532]

Time to perform SCIENCE!

[Anonymous No.3396538]

Lights guy? is that you?

[Anonymous No.3396553]

Yep, it would be me.

Just need to get my fan hooked up and it's time to roll.

[Anonymous No.3396559]

>>3396557
My goal is maxium cannabinoil content, not max yield.

[Anonymous No.3396557]

Wow, i am glad to see you. i'm going pot, and right now i'm just using those ultraviolet lights typically for reptiles.

Should i be using something else?

[Anonymous No.3396577]

>>3396557

LED + UVB emitting lamps (like reptile lamps) would ideally be the way to go for mad potency.

[Anonymous No.3396587]

>>3396577
awesome, thanks for the tip lights-guy.

[Anonymous No.3396588]

>>3396587

You're welcome.

Now I just need to acquire 36 clones......

[Anonymous No.3396595]

>>3396557
>>3396559
You mean fluorescent tubes for reptiles? Those probably have a good spectrum but limited lumen output. Metal Halide for vegetative growth and High Pressure Sodium for flowering is the gold standard lighting setup as far as I know.

FYI: Cannabiniod content is going to be more a factor of your strain than the lights you use, assuming you have enough light for the plant to grow.

[Anonymous No.3396605]

>>3396588
Sea of Green is your plan then? That doesn't look like a big tent.

[Anonymous No.3396624]

>>3396595

Lumens means exactly nothing to plants. Photon flux density and proper wavelengths are what matter.

The UVB lamps are for potency. John Lydon proved this one back in the late 80s.

HPS and MH are finished. LED has much higher efficiencies (with latest lab stuff pushing well past 45% input/output efficiency) and lasts longer.

>>3396605
Doesn't need to be big. Flowering right off the bat I'll pull an easy half pound, which is my legal limit anyways.

[Anonymous No.3396664]

someone wanna fill me in on who lights guy is and what he does?

[Anonymous No.3396763]

>>3396624
>Lumens means exactly nothing to plants. Photon flux density and proper wavelengths are what matter.
Isn't luminous flux just photon flux density adjusted for the human eye's spectral sensitivity? I'm not an expert at this stuff; educate me please.

>HPS and MH are finished. LED has much higher efficiencies (with latest lab stuff pushing well past 45% input/output efficiency) and lasts longer.
I will upgrade to LED someday but HPS and MH are still pretty efficient and a hell of a lot cheaper. On a related note: how is the heat output of your LED fixture?


>The UVB lamps are for potency. John Lydon proved this one back in the late 80s.
Thanks, that's good to know, but I still think the strain will make a bigger difference in potency than adding UVB lights. May as well optimize both I guess.. .

[Anonymous No.3396814]

Should the UVB lamps be placed at a certain stage?

What LED fixture are you using in that picture?

[Anonymous No.3396884]

>>3396624
>The UVB lamps are for potency. Johnny Rotten proved this one back in the late 80s.

laughing_botanists.jpg

[Anonymous No.3397149]

>>3396884

>He doesn't know who John Lydon is.
>laughing researchdirector.jpg

>>3396763

No, luminous flux is purely weighted at green. Photon Flux Density accounts for all photons.

HPS and MH are not that efficient. 15% is pretty weak compared to LED at 45% and higher. And changing bulbs is expensive, with quality horticutural bulbs running in the lower 60-75 per pop for lower wattages.

Heat? What's that? :D

[Anonymous No.3397157]

>>3396814

UVB lamps should be used in flowering.

The LED fixture belongs to my company.

And for the supposed botanist - come back when you've got a research lab like mine, pic related.

[Anonymous No.3397223]

>>3397149
>doesn't know what a joke is
>thinks empty supposition and evolutionarily just-so-stories are proof of anything

[Anonymous No.3397344]

>>3397223

>doesn't know how to properly make a joke.
>doesn't spend his days actually reading the studies and performing the experiments to verify their results.
>2011

I seriously hope this isn't so.

[Anonymous No.3397739]

>>3397157

Interesting, I presume it's using 1 watt LEDs?

I was planning on building one myself but it seems like buying something manufactured would actually be cheaper.

[Anonymous No.3398000]

>>3397739

3w single-chip LEDs underdriven to 1.5w.

And yes, it would be much cheaper to buy manufactured, as we can get the stuff far cheaper due to our bulk purchasing power.

[Anonymous No.3398024]

>>3398000

>3w single-chip LEDs underdriven to 1.5w.

Whats the reasoning behind this? I've always heard that 1 watt is the best for efficiency. Everything over or under that is too little or too much. 3 watts doesn't actually penetrate the canopy any more than the 1 watt bulbs.

[Anonymous No.3398028]

>>3396577
>LED lamps
>cannabis

I've never heard of somebody actually recommending this.

[Anonymous No.3398035]

>>3398024

Nope, you get much higher photon flux per unit of energy underdriving the more powerful diodes.

3w penetrates more because more photons, even being driven at 1.5w.

>>3398028

Well, there's a reason I'm a research director for a multinational horticultural company.

[Anonymous No.3398064]

>>3398035

So you just use a driver that can only spit out half of the total "required" wattage?

[Anonymous No.3398100]

http://www.youtube.com/watch?v=s3XH-_2GhaM&NR=1&feature=fvwp

>LED Lights

[Anonymous No.3398107]

>>3398035
You've got my attention. I always wondered why people said they were shit, I assumed it was because most LED assemblies are shitty Chinese things that don't emit the right frequencies.

[Anonymous No.3398125]

>>3398035

What fixtures are you using?

[Anonymous No.3398197]

Is this legal where you live, OP?

Also, where do you get your seeds?

[Anonymous No.3398218]

>>3398197
>Implying it is legal anywhere

It only varies in how much you can get away with. But it sure as hell ain't legal.

[Anonymous No.3398220]

>>3398064

No, it's a 50% duty-cycle, not constant current half power.

>>3398100

That dude got outed as a total moron. Why you even use that video is beyond me, especially when it says 90w UFO and that is a 120w panel. Also, dumbass is doing it in soil, LED is meant to be used in HYDRO. DUUUUURP.

>>3398107
>>3398125

My fixtures are Chinese made but I actually went over to China to ensure I wasn't getting a shit assembly.

I can drop kick these bitches on a warehouse floor and then kick them across the warehouse, plug them right in and they'll light up no problem.

They are my own brand and internal design. I'd rather not advertise.

[Anonymous No.3398230]

>>3398218

I'm pretty sure it's legal for medical marijuana patients to grow a small number of plants for personal use, It might be legal in countries where weed is legal, too.

I was just assuming that OP probably wouldn't be posting this stuff online unless it was legal for him to do so.

[Anonymous No.3398232]

>>3398220

>I'd rather not advertise.

Take my money dammit.

[Anonymous No.3398251]

>>3398035
>growing with LEDs
>using them like they're gas discharge lamps

[Anonymous No.3398265]

>>3398230
>countries where weed is legal

I'm struggling to think of one.

[Ecogroled No.3398287]

>>3398230

Yep, I'm legal.

>>3398232

If you insist - look at my name. Add .com.

Don't balk at the price. You're getting top-notch equipment with a specialized light blend to hit just the bare essentials.

[Anonymous No.3398295]

>>3398287
Feds don't call it legal. You'll go to federal prison

[Anonymous No.3398306]

>>3398295
Pretty sure there isn't a single country in the world where it is explicitly legal.

[Anonymous No.3398309]

>>3398295

My company is one of 55 that has a federal license to grow for research purposes. Didn't know those were issued, did you?

Oh, and sativex is getting FDA approval so the DEA has no choice but to drop the scheduling down to II.

[Anonymous No.3398313]

>>3398306

Portugal.

[Anonymous No.3398329]

>>3398309
>Oh, and sativex is getting FDA approval so the DEA has no choice but to drop the scheduling down to II.

Psht, GWP is a UK based company and it isn't even legal in the UK. Technically even Sativex isn't legal in the UK, so many people can't get it. Our government is that fucking retarded.

>>3398313
Decriminalised possession of small amounts != legal

[Anonymous No.3398345]

>>3398329

Doesn't matter, they've gotta drop it down with FDA approval for medical usage, lus DC itself has legal medical marijuana so the feds are seriously kinda screwed here.

[Anonymous No.3398362]

>>3398329

http://en.wikipedia.org/wiki/Legality_of_cannabis_by_country

Decrim is still legalized, especially since they did it with EVERY drug.

[Anonymous No.3398366]

>>3398345
What I mean is that cannabis in the UK is categorised as having no medical usage. Meanwhile the Home Office permits GWP to grow and take extracts of cannabis for medicine, but doesn't clarify the law so that NHS Trusts are liable to prosecution if they supply it to patients. Maybe America is less retarded than us, but you might end up with the same problem.

And I'm no expert in the American legal system, but isn't Federal law higher than State law?

[Anonymous No.3398370]

>>3398362
Go ahead and grow some cannabis in Portugal then. Find out how legal it is the hard way.

[Anonymous No.3398386]

I live in Portugal.

You can't market seeds but you can grow it all day long and they won't mess with you.

Must be a stupid American or UKfag talking bullshit.

[Anonymous No.3398396]

>>3398386
Oh right, so I could set up a shop and just sell it?

[Anonymous No.3398416]

>>3398362
>Netherlands
>Sale: Decriminalized/Illegal to tourist from end of 2011

OH GOD WHEN DID THIS HAPPEN, FUCK THIS SHIT.

[Anonymous No.3398441]

>>3398366
yeah federal is higher than state level, but if the state makes it illegal, the feds lack the power to enforce the federal across a state that won' assist, and forcing the state to conform is an unwinnable battle of bureaucracy, so if a state makes it legal and it is sufficiently widespread, the feds won't do shit unless your a target for something bigger and they need to catch/extract information from you.

[Anonymous No.3398463]

>>3398396


You can't sell it in bulk and not out in the open.

[Anonymous No.3398523]

hey is it plausible that LED light may produce teach with a different quantum energy state that differs from plants grown in sunlight?

[Anonymous No.3398568]

>>3398523

[Anonymous No.3398572]

>>3398568

That only applies to white LED lighting.

You will find zero green emission lines in my panels.

[Anonymous No.3398594]

>>3398523

No, but you will increase your THC content with LED if properly configured

[Anonymous No.3399109]

AAHAHAHAHAHAHAHAHAHAHA GROWING WEED WITH LED


if it was really possible, then you could do it without any form of supplementary light whatsoever.


no one, not even the people who clutter weed forums with their bullshit, is capable of doing this.


the claims that it is useful as a supplementary lightsource with CFC is also pure and utter horrific bullshit.

there are no LED designs that solve this problem.

not the Luxeons. nothing.


this shit is dead science and NASA gave up on it years ago.

[Anonymous No.3399116]

>>3398594
>>3398594

AAHAHAHAHAHAHAHAH OH WOW I CAME

[Anonymous No.3399138]

light is nothing but photons with a specific E given by E=hf.

you either have the wrong frequency photons, or not enough of them. period

[Anonymous No.3399295]

>>3398366
yes and no, it depends entirely on your legal capacity beyond being sui juris. If you're a lazy shithead who isn't willing to learn jurisprudence, then yes, federal does trump state law; if you're a curious individual who can always act respectful no matter what then no, state law protected under state constitutions do not trump federal law.

[Anonymous No.3401003]

>>3399109

I see you're quite stupid and ill-educated.

Pure LED grow - made High Times Pix of the Crop.

http://hightimes.com/gallery/ht_admin/6828

Try again when you actually have a clue!

[Anonymous No.3401204]

>>3399109
well nigger?

[Anonymous No.3401440]

>>3401204

I'm waiting on his reply as well. I doubt hell have shit to say since he just got thoroughly owned.

I'm a research director, lets see what he is.