Oh boy! Another video about lights. It's almost like this channel has turned into the Light Bulb Show. Give this shit a break man we are getting absolutely sick of it.

There's actually been a bunch of content in the past 3 weeks that isn't light-related...it just isn't being uploaded on to YT anymore. You gotta follow me off-platform. Plus, light content is important - your light fixture and light is your #1 most important piece of equipment. Nothing else impacts yield more. There's also nothing except light your plants can't make it more than 72 hours without.

@@truthfulreviews488 some people just like to act like they are above it all when it reality they are the most weak kneed cowards on this earth

@@truthfulreviews488 I believe I will unsub from this half ass channel. This fool doesnt even show us what the bud looks like after he is done with the grow what kind of shit is that. For the past 10 weeks it's been nothing but lights and scientific bullshit.

BRING BACK THOSE COOL SUN GLASSES.

no it's not ... :D he did mistake Usable PPF for PPFD ... and it has a unit: its micro mols per second. also using over 1000 umol/s will most likely require CO/2

These values are for Indica strains. Sativa loves the heat, omg; even guzzling down 1400 PPFD.

Are these #s for autos or photos?

More specifically, I wouldn't have known of the Cannabis Encyclopedia without your video. There is so much uneducated data out there, I appreciate the forward to that book.

@@AverageJoe8686 I'm the Night Creepy Crawler and I shall share a bowl of Terror with you in your dreams, now and forever.

Lol foreal

Same! 😆

I like him better without the shades 😎. Great video

He's not in the grow room, gotta have protection :)

Lumens is to measure light for the human eye wavelength, not for plants you need PAR to get a true reading for the plants not his eyeball.

Search for converting lux to par

I Lux you very much, darling.

Not really back; like, today's actual new episode won't air on YT at all...this episode is from a week ago. just didn't want to keep this particular episode off YT - PAR is fairly important stuff.

I heard about that way back in the early 90's when it was illegal everywhere, could never understand why they would choose the magnolia state, a ounces gets you 10 years, lol

depends on what you're growing some plants lettuce for example I think doesn't need much at all if you wanna grow some sticky tho these plants need a ton of light (they can use up to 1000 umol/s and with CO/2 and perfect conditions even close to 2000)

So there isn't much info when i just tried looking this up, are you sure that Autoflowers have the same DLI as photoperiods? I've heard that auto's have higher DLI's so they do want the higher amount of ppfd throughout the light period, but there isn't much in terms of what the dli for cannabis is. I've seen 30 moles for photoperiods and upwards of 40 for autos, but nothing in terms of actual studies.

I think it varies widely depending on strain. I had an auto that got very light stressed at 900ppfd for 16 hours. She's much happier at 500-600ppfd. While another auto from a different strain was totally fine under 1500ppfd for 18 hours. The numbers in Lex's video are general guidelines, but what's optimal for your particular plants might be different. Luckily the plant will usually let you know if it's getting too much light, so you can test, observe and adjust.

Yes, as I kinda imply here again when talking about the Mexican Sativa that was tested - there's always strain-specific truths that you'll only discover once you grow a certain strain a while. My numbers are always just the rough guidelines.

Also I suspect that plants might have different tolerances depending on the light spectrum used (e.g. Blue/Red LEDs vs. Full spectrum white). Room temperature is another factor, since its closely tied to plant metabolic and photosynthetic rates.

I’d like to see a study of the effect of CO2 and ppfd on autoflowers. There isn’t a lot of information on DLI targets for cannabis, even less for autoflowers specifically.

Hey TeW33zy, your comment regarding ppfd is exactly what I've been looking for. Can you provide a plan? So far this is what I've got, please correct any mistakes and help me complete it. Day 1-7: 140-170 ppfd Day 8-12: 200-250 Day 13-21: 275-300 Day 22-30: 350-400 Day 31-60: 400-600 ppfd Day 61-90: 700-900 ppfd I'm using the Photone to get an approximate measurement. I've just written some suggestions without knowing anything.

@@bastianm5478 I am a Sr. Biosystems Engineer, Agricultural. I got you covered. Ok so ppfd, C02 and Nutrient ppm are a function. See Below The Nutrient feedings are based on using Fox Farm Soil from the beginning. You shouldn't have to feed Nutrients until mid Flower. Feeding in veg only should occur if your plant eats up all the food in Fox Farm soil. Your plants leaves will tell you if so. This generally happens only if you stayed in a particular pot size to long or past 3 weeks. Generally, Fox Farm Soil has enough reserves until your next Transplant. If u plan to stay in the pot size longer than 2-3 weeks then feed accordingly. Usually 1 Feeding will give you another 2 weeks. Seedlings: Day 1-30 = 165ppfd (party cup) Day 31= Transplant to 1 Gallon Day 31-45 = 200 ppfd Day 45 = Transplant to 3 Gallon Day 45-65= 250-300 ppfd Day 65 = Transplant to 5 Gallon Day 65- until Flower 300 ppfd (Transplant how you best see fit, u do not have to follow my scientific regimen) Transition to Flower Day 1-30 = 500 ppfd CO2 700ppm Day 35 -75 = 700 ppfd CO2 900ppm ⚠️ Warning ⚠️ Do not go over 750 ppfd without CO2 supplementation of 1000ppm or greater or your plants can/will turn to a hermaphrodite. C02 must always be 200ppm above your ppfd. C02 supplement table below: 500 ppfd = C02 700 ppm 700 ppfd = C02 900 ppm 900 ppfd = C02 1100 ppm 1000 ppfd = C02 1200ppm (83°F leaf temp is required for adequate photosynthesis for ppfd above 700) Tip: Never exceed 1,000 ppfd otherwise you burn the capitate-sessile, capitate- stalked, and capitate-bulbous trichromes and volatize your flavornoids, cannabinoids, thc and terpenes. You deplete the aroma by 85% as terpenes are extremely volatile. They evaporate at temperatures above 71°F after harvest and at 87°F or greater during flower from heat occurring from ppfd above 1000-1200. Nutrient ppm should match your ppfd. Feed Nutrients every 4th watering. Ppfd, C02 ppm and Nutrient ppm should match. Except C02 ppm should always be +200 to allow the plant to keep up with carbon dioxide.

That is money better spent on environmental control or more lighting. Unless you have money you don't care about, a home grower doesn't need a PAR meter.

Why not

@@shaolindreams Because it's expensive and you don't need it the same way you need to control temperature or humidity.

Why can't you LED fanboys ever just be honest? Same story, same nonsense, same bullshit math that cannot ad up. A single 300w draw LED isn't capable of yielding more than a 1K HPS. It's closer to about 500w draw to start getting close to 1k HPS and you need about 600w just to start closing in on a 1k DEHPS, so no. You're also describing a grow op setup and not what a first time grower would have. You also go from "I'm/my" to "we", so you are just lying out of your ass about everything as a whole.

Des420 give me an email address and I’ll send you a video. Otherwise, you’re just another guy refusing to believe the Easter bunny isn’t real. Ask yourself why Gavida is spending all its efforts on a new product and abandoning hps?

@@dirigoelectric How about you just post a documented grow on your KZfaq channel for everyone to see? Otherwise you're just a guy talking a bunch of nonsense. Ask yourself why you need to lie to improve your low self esteem?

Des420 kzfaq.info/get/bejne/b853nc6YtK23eYk.html

Offer a guy proof, and .....crickets chirping

lol yes, i looked into this after; it's exactly correct. They're involved in the last remnants of the Federal medical program.

Other then what is seized throughout the country from the major illegal grow ops

They also grow the only legal research cannabis.

@@LarsLarsen77 that is actually false there us a government funded research facility here in Missouri in Eureka that grows its mainly for the research into cbd but still the fact remains there is another government funded research facility and probably more that we just dont know about through out the country that are ramping up for full legalization like Canada but its big tobacco and pharmaceutical companies that are greasing the plams of politicians

Not why, but WHY!?

Research my ass this university is part of the problem. They have suppressed research thanks to big pharma but they still needed a token "research" location and this is it.

Sadly true, their quality has been reported to be barely above Cannabis Ruderalis by the one federally legal patient that was interviewed. As far as claims to other universities having permissions from the govt, I know that there is current litigation over this because of the blockage, so I find the post about the Missouri university suspect. I do my best to keep abreast of these issues, but welcome new input always.

and everything else - nutrition, water, temp mgt, ect.

We read the same book and watched the same movie. Ambient CO2 is 300-400 ppm. CO2 for extreme lighting - 1200-1500 ppm. You also need more nutrients, water, heat, and air current management. Amen, My Brothers in Ribosomoes.

Graduate the distance weekly till you see bleaching Chow

Speak for yourself - I have a vat of fresh eyes gestating right now.

NO NO NO. A better indicator would be the pre-sexual traits at the nodes of young plants. Male plants have a penis or knob looking mini structure (stamina) at the node lol. What you are describing is genetics. All seeds contain different genetics - different phenotypes and genotypes. Go do some research. Also males plants grow taller and more distance between the nodes or branches (leggy).