Photos and Autos Recommended PAR levels for Photos and Autos

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Growers have been increasing the light intensity or PAR levels in the grow room thanks to the increased efficiency of LEDs but how does this apply to Autoflowering plants with their longer lifecycle?
In the past the limiting factor to increasing light intensity for indoor growers was heat and Photoperiod plants (must be on a 12 hours lights on cycle to flower)were the only game in town . Typically the largest HPS fitted in a 4ft x 4ft (1.2m x 1.2m) grow tent was a 600w system and would deliver about 550 µmols/m²/second. Increasing to 1,000W HPS was not possible because of the heat output of the lighting system was too much to treat with extract fans.
Now we have LED grow lighting systems which are almost twice as efficient as the best HPS systems available and so growers are increasing the PAR levels in their grow rooms to 1,000 µmols/m²/second and higher. However PAR intensity levels of 1,000 µmols/m²/second and greater require raised CO2 levels which require closed systems and expensive CO2 cannisters, sensors and controls.
For the novice to experienced grower applying PAR intensity levels of about µmols/m²/second for Photoperiod plants will achieve very good yields from your grow space. To calculate what this means in terms of grow light wattage there is a table to convert this PAR intensity to consumed power for different types of grow light systems: • Photos and Autos Recom...
The average intensity of 900 µmols/m²/second over the 12 hour period equates to about 40 DLI (Daily Light Integral, the amount of PAR reaching the plant over the total light cycle). This is an important measure because, although plants can absorb PAR intensity up to at least 1,500 µmols/m²/second for a period of time, plants are limited as to how much light they can absorb over the total light cycle.
For Autoflowering plants the typical light cycle is 20 hours on and 4 hours off. This maximises the time the lights are on while still allowing a few hours darkness for the plant to 'sleep' and metabolise. Because the day is longer the PAR intensity can be lower to reach the same maximum 40 DLI. Here is the table for the recommended grow light system wattage to achieve our recommended PAR intensity of 550 µmols/m²/second for Autoflowering plants: • Photos and Autos Recom...
There are caveats to consider of course.
If you go over the maximum I have recommended in these tables you should still get an increase in growth rate, it just may not be a '1 for 1' increase i.e. 10% more PAR intensity = 10% more growth, for example it may be 5% more growth for 10% more PAR intensity
It is strain dependent, some are much more suitable to high light intensity than others
Other factors such as temperature, nutrients, humidity, CO2 levels etc can restrict the growth potential from your plants if not optimised
#growlight​
#PAR
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[@MIGROLIGHT]

Hi, Shane here. Thanks for watching, Please hit the like button and subscribe here: www.youtube.com/@MIGROLIGHT?sub_confirmation=1 Buy my Grow Lights here: migrolight.com/ Follow us on: Instagram:instagram.com/migrolight/ Facebook: facebook.com/MIGROLIGHT/ TikTok: www.tiktok.com/@migrolight

[@Meowpheus101]

​​@MIGRO Hi Shane. Would really appreciate to know if I'm understanding this correctly... Let's say I have 2 separate tents growing Autoflowers, both have exact same spec grow light & no dimmer. If I have one grow running 18/6 with light height from canopy adjusted for PPFD of 617 μmol to get a DLI of 40 mol vs the other grow running 20/4 with light distance adjusted for PPFD of 555 μmol for same DLI of 40 mol; are they effectively both getting same amount of light per day due to same DLI meaning it's more efficient & cost effective to just run 18/6 & forget about 20/4?

[@deneb3552]

I enjoy watching Shane's videos even if I don't particularly have a question or issue. Such a mellow fellow with humble attitude and tons of knowledge. A perfect human really.

[@eric8630]

I was always burning my autoflowers because I figured pumping up the light is what they needed.. But once I learned about "DLI" I was surprised.. Very surprised.. But it all makes sense.. Thanks again!

[@MIGROLIGHT]

Eric, I should have covered this topic a long time ago for Autoflower growers. I have finally caught up with what most people are now growing😁

[@eric8630]

It is a very important topic.. I barely leared about that this year! Ive been burning all my autos to a crisp 😭 also, i am so glad I bought a par meter.. They take all the guess work out.. The recommended height for my light in my current grow says 24" at 25% power.. But the plant is in veg and only receiving about 200 - 230 μMols throughout the 2'×4' canopy.. But when I drop it down to 12" at 25% power, I get about 400 - 450 μMols throughout the 2'×4' canopy.. And keeping the power at 25% helps keep temps down.. PAR meters are so helpful!

[@Trrenik0kb]

@@eric8630 what lights you are rocking? A i too have 2x4 size

[@chanoone7812]

Spring sunshine into summer sunshine into fall sunshine

[@chanoone7812]

To stop seedlings stretching they just need a little wind and they will have twice the base you normally get

[@normagee]

ive been getting good results with my autos on a lower power than I keep seeing people using . thanks Shane , apprecaited 😎

[@johnbaker5565]

Much appreciated. I learn interesting stuff from you. Having a lighting Guru appearing regularly, and actually enhancing understanding is fantastic. I had no idea that autos and photos required different amounts of light. You serve the growing community in very noble way, thank you Shane.

[@johnbaker5565]

@jon barker Nice to meet you online also

[@lyndahenry5469]

Oh get a room, you two🔝😉

[@1TheWhiteKnight1]

They don’t if you flower them on 12/12

[@QuantumFarmer]

Thanks Shane 🙂👍

[@manantialestrip1]

Shane,gracias por aclararnos nuestras dudas.Inmejorable tu labor ,gracias.

[@eric8630]

Love what you do.. Thanks alot!

[@jeanku]

Not only excellent products but quality information.

[@rollandcolbourne1807]

The only meter I can afford to measure my ppf is viewing your well documented video documentaries. Thanks

[@daletennant3021]

You sir inspire us to be better. Thank you for your help and wisdom

[@pascoebrock5877]

great at last someone is looking into this well done MIGRO

[@tatertot7105]

Shane I was literally googling this topic trying to find right answers. Hardly anyone realizes autos require less and I have been putting too much light causing my plants to go to sleep too early on a 18/6 schedule, and also causing leaf tips to try flipping upside down. I should have took the hint. Thank you so much for true clarification.

[@nomenclator4339]

what do you mean by plants going to sleep too early?

[@christoronaldo7673]

@@nomenclator4339 I guess he means the lightschedule and that the plants ''go to sleep'' after 18hrs of light

[@nomenclator4339]

@@christoronaldo7673 well that would make sense but he said "too early" and I never heard of a plant going to sleep early with full lights on

[@SkunkPunch73]

Thanking you kindly for your kindness in giving us this information my man it is very easy to understand. Have a beautiful day 😘👍🏼

[@timdarmetko4039]

thanks again ! :) I watch every video you have .

[@smokeygingerman]

I never knew that about autos! Thanks very much for the great info as always Shane! :)

[@FLABees]

Keep this gems coming ! Thanks

[@Convolutedtubules]

Studio looks really nice and clean. Love it 👍

[@GsxRl-hd2gz]

Another Great and educational vid nice1 Shane 🏴󠁧󠁢󠁥󠁮󠁧󠁿

[@chrisrosenkreuz23]

thank you for this information! your work is much appreciated

[@bananas7479]

Hey perfect video for today.

[@martinellen9334]

big up Shane 🌱👍

[@dirtfarmer4885]

Thats cool. I was amazed at the fact that the autos i grew last winter, in 4x4 using only two 150w (300w) leds, came out fantastic. The autos i grew outside, the following summer, hated life. Most of the flowers foxtailed and or just didn't look or smell right. Some of them hermmied and self seeded as well. The crazy thing is, I used the hermed seeds for the next round of autos towards the end of summer and they came out awsome with very little anomolies and all maintained their fem/auto status. I attribute the difference in results to the ruderalis strain in the autos. I'm doin autos right now in Nov outside with shorter days and cooler temps and they love it

[@jordanmc5340]

Hey thanks for this info. Just started playing with autos last summer. Grew some outdoor. They hermmied as well. Still smoked ok once dried and cured. But I've been curious about the seeds till now. Just researching an indoor set up to grow thru the winter now. Appreciate the info.

[@rmcnasty7319]

Hello Shane Good Video, thank you for sharing your videos

[@JMJM75257]

First time auto grower here. You just saved me from using a photoperiod light intensity on my autos! I would have frazzled the heck outta them!!

[@showmegreenthumbs7415]

Appreciate the info on auto's they are what I believe the majority of new grows

[@huntergardner1653]

Yes! As an auto grower this info is gold, anything I find on par relates to photos, hard to find any solid info on auto and here it is, thanks Shane

[@jamesfranklyn8547]

Thanks for all the great videos and information, looking forward to buying my first Migro light very soon.

[@balista9831]

useful stuff Shane thankyou, have to watch again to get that auto info lol atb.

[@KindLEDGrowLights]

Great video! Very informative.

[@chastheplayer8367]

I have an array 4..great light, thx shane👍🏻

[@stevecrabtree7654]

Well said video!

[@elrinconsubversivo5763]

Thankyou!¡¡ Very nice information.

[@shanefowkes7451]

More than happy to drop that thumbs up hope it helps, your straight to the point and always point blank, screw the haters, love the content

[@denislukasov4813]

Like first and now watch Thanks Shane

[@seanpaula8924]

Thank you for the information Shane. Maybe this is why i have trouble when my autos go into flower.

[@420homegrowz5]

Thanks that is very helpful

[@YaMumsSpecialFriend]

Fascinating, I’ve been using a 24hr light regime on my auto’s. Using a quality living soil has been a game changer too and is giving me the healthiest plants ever, and zero worries re fertilising use and water Ph and such! Bliss! Quality lights on top, quality ‘live’ soil on the bottom..can’t just focus on one aspect. Having my 2 x 4 setup in a bedroom wardrobe means a little extra CO2 at nighttime too. I may reduce my light regime to an 18/6 or 20/4 now however. Thanks for the info.🖖🏼

[@1SmokedTurkey1]

I'm rocking 24hr light regime, too. You think we should drop to 20 and target 550umol?

[@YaMumsSpecialFriend]

@@1SmokedTurkey1 didn’t see your reply till now but yeah, I’m reducing it to 20/4 or even 18/6..mostly as the room it’s in gets very warm during the summer days. Deep green leaves, nothing but water and maybe a top dress with worm casting..bliss!

[@ganjah-far-i7124]

Greetings spaceman...do you have any experience of FLO (florians living organics)? Mi about to start a grow with auto's & FLO and would be very greatfull to get some of your wisdom...manufacturer providing info only on photoperiods as usual so the ideal feeding amounts for auto's are mi main concern...and have you re-potted your auto's with the living soil or mixed all nutrients for the whole lifecycle on 1 go? Grower Love Idren🙏🏻

[@Pizzastevesgardenandmore]

Good work yo!

[@Mainewoodsgrow]

Love the content Shane, you go brother!

[@MIGROLIGHT]

Thanks Brett.

[@Smotpoker]

I ran my autos at 800ppfd 20hrs a day...they loved it ...

[@UbiquitousRomp]

From what age did you run that power....How much can you give 3rd week veg.....can you post a schedule of power through the grow....week one, week two etc?

[@Smotpoker]

@@UbiquitousRomp as soon as they hit 5 nodes they can handle it. I use a Apogee mq500

[@alancoulthard9480]

Boom love it

[@winddrift03]

I think your assumptions about autoflowers is wrong, in that just as with photoperiods, the amount they can handle varies. Run them 18/6 at 800 PPF, most modern autos will do very well. Some of the older, Lowryder based autos won't be able to handle that much light, but the only real way to know is to grow them! I'm growing my autos under HLG lights, a 650R and a Scorpion Diablo. I'm keeping the lights adjusted to 800-900 PPF.

[@MIGROLIGHT]

Hi, I agree you can increase average PAR above the levels I have recommended but I think the rate of return reduces above these levels, thanks, Shane

[@UbiquitousRomp]

@@MIGROLIGHT....How much can you give 3rd week veg.....can you post a schedule of power through the grow....week one, week two etc and when to scale it up? I've read the 550/600 at the end of veg / early flower as a target, I went for quarter power 150w PPFD for the first 10 days on 24 hours for temps as it's cold here when lights go out.. then went half power 300w giving me par of 309 at 56cm and a DLI of about 20....but I'm really not sure when to lower or turn up the power to increase my Par/DLi readings from here, so a schedule of increases would be really useful shane.

[@sixmillionsilencedaccounts3517]

@winddrift03 The question isn't if they can handle it but what you're really getting for much higher electricity cost so = grams/watt.

[@razorback0z]

Thanks.

[@Azt3k9]

Yes! I've been using a 200w light in a 1m² tent with great results on autos. Great information mate.

[@ineedmysyq]

How many plants?

[@Azt3k9]

@@ineedmysyq 9

[@justinwood2881]

Thank You...🎉😮🎉😮🎉

[@3star2nr]

I use a mars hydro ts1000 i run them at 65-70% and 16" for veg. Fullblast for flower. Only grow 2 plants max. Plants are loving it and temp and humidity is pretty stable. The mars raises temps near root 5 degrees above outside tent condition.

[@bennybenson2635]

Awesome video bro

[@wendymallon7890]

Dutch Passion auto Euforia doesn't like Marshydro at 18in - looks like heavy nute burn with a nitrogen def. Moved the plant away from the lamp and the colour's coming back nicely. You saved my plant. Cheers

[@laurieedeburn2449]

thanks

[@cheiftain732]

Dark is as important as light always .

[@ace2044]

woah camera quality upgrade nice xD thanks for the vijeo (^.^)

[@reecemccullough4829]

The best

[@peteryoung4301]

i run my led lights at 50% through veg into flower week 6 to 7 i dim them even more for final 3 weeks.🇦🇺

[@thedude-wb5vx]

Ive been trying to figure out what par to run autos. My first run i did like 900 and my leaves after a week looked like a horrible cal mag def. My current run i was doin like 750 and am seeing leaves crisp up and taco. But took your 550 x 20 got 11000 so i run my lights at 18 hrs a day and turned them to about 590 600 at canopy top. See if they come back to life. The color will be crappy on just the leaves but think this will be good am also seeing the benefits of plant training because the lower set of bufmds are getting like 400, which i know can absorb more but the tops will be in the crisp zone so no bueno. Awesome video dude!

[@sirrichard6685]

Great video, can you go into dli more

[@grilljones]

Shane, what distance is assumed for these power recommendations?

[@TaesWon420]

Thanks for this. When I built my set up, I went with a 5x5 and 2 SP3000 from marshydro. Afterwards I was worried that I was low on my watts per square foot. But looks like I’m spot on for my autos 👌 one day I plan to put a little more light in (hoping to find another 300w for cheap, to get better penetration. But also don’t wanna push my DLI to much)

[@ahlers1977]

I have the same exact setup. How many autos do you normally do at once?

[@TaesWon420]

@@ahlers1977 I do 4 since that’s the legal limit in my country. And usually that will fill the tent wall to wall in flower. Smaller plants you could manage more for sure though.

[@ahlers1977]

@KootsRoots thanks for the reply! Our state limit is 5 so I haven't done more then that but I'm sure a 6th would easily be possible since I use 5 gallon pots. Using 7 gallon I'd stick to 4 more then likely.

[@TaesWon420]

@@ahlers1977 I use 3 gallons in coco. Watering multiple times a day sucks haha but looking to get something automatic installed. I’ve found that by doing 3 galling coco coir with a salt based fertilizer such as flora-flex or something similar, I get some pretty big plants, typically each plant is easily a quarter pound at minimum, so 4 plants is a pound harvest at least which supplies my smoking habits between harvests. Another thing that helped me (maybe not so much if not using coco but not sure) is Rainscience grow bags. Much easier to clean and reuse than your typical fabric grow bag, better root pruning and more airflow to the roots. I found as soon as I started using them my plant size had to have doubled as I was getting much smaller plants doing my same coco-floraflex in normal fabric grow bags.

[@TaesWon420]

@@ahlers1977 I mean, it’s not so bad I guess. I water once in the morning once at night. Few cups until it runs off. Got the style from Mrsfunk420 who grows massive autos, and basically just follow her method with great results.

[@force9966]

Thanks Shane I grow autos exclusively. Thanks for the information makes sense 12 hrs to 20hrs less light intensity is needed. Never really thought about it.

[@archdevilzero5020]

it doesnt make sense :D they grow on 18-20 hours but in 6 weeks not 8 ( in general) the new auto generation is over 20% u cant have the same tch cbd etc when u got less 2 weeks flowering and less light :D autos now can handle the same like photos :) grow them in 30l pot and u will see the diference:D

[@1TheWhiteKnight1]

The leaves often droop once they’ve surpassed the DLI. You will notice this about an hour before lights out.

[@Trrenik0kb]

@@archdevilzero5020 exactly

[@sixmillionsilencedaccounts3517]

@@archdevilzero5020No auto finishes in 6 weeks lol. The seedtoharvest time given by breeders is nonsense. MOst autos take 80-90 days except some small low yielding crap like Lowryder. "grow them in 30l" If you want to waste space and pay extra for medium than sure.🤣

[@paulie6446]

Thanks Shane that helps a lot ✌🏻🌱🤘🏻

[@rumbeach375]

When will I start to see migro approval stamp on all manufacturers horticulture lighting. Don't buy a light unless you see the the Migro stamp of approval. For safety and performance grantees 😎👍

[@NoGreedSeeds]

Good idea! He certainly sets the gold standard for this kind of content.

[@emmettoconnor3393]

Ur a good lad il gona call in bin ur shop need have a quick chat with u and am going ti buy a few bits and it nice ti be able to help u over us companies ect and u say it as it is unlike some

[@Bladecutter]

Excellent information. Can you make an extension video that gets into DLI? I see that the DLI for photos was half of that for the autos. How can I determine the DLI for my plants?

[@Queerpunx]

I would also appreciate a more in depth DLI video.

[@snorkyfin1879]

I recommend watching this video by Dr Bruce Bugbee kzbin.info/www/bejne/f3Wco3hrf8qqjMk The calculation of the DLI starts at ~23minutes

[@tkermi]

No, the DLI is the same 40 for both.

[@damiancoon2519]

@@Queerpunx Dr Bruce Bugsbe Utah state university professor. Has great vids on this subject.

[@drewcarr4478]

So how many watts is good for a 2x2x4 grow area? Is the bloomplus bp1000 to much for that space?

[@trchd1532]

So what is the recommended height for auto flowers? And what would the different dimmer strengths be the same as you state on the website? Or would those strengths change too

[@NinjaRastaMon]

I don't know about you Shane but with a proper array of these new LED's you have reviewed for me, I have switched to 12-1 veg with 8 on 16 off flowering cycle, also known as GLT with great acclaimed results. Harder to find info about but it's also an old professional practice in Agriculture and it sure works great, and lightens up the load on the equipment, plant stress, excess nutrient uptake, and quit a few other things. This would only be ideal for Photo period and most likely not autos in any way. Also I would use 16 on 8 off for autos if I didn't refuse to grow them. There are now "fast" photos available lately that make the need for auto use even less to me. Thanks for all the help Shane, hope to hear someone looking into 12-1 or GLT (Gas Lantern Technique) in future!!!

[@majmat]

It's good technique for stopping flowering, just putting the light on for 1 to 2 hours halfway through night period, saves electric, but you can get a more little stretch than normal. It doesn't work for autos, you just end up with crap .

[@jayl4427]

What changes would I get if iv dropped the light down to 6in above canopy with right par levels as specs at 32in till they get bigger and lift and readjust hight and dimmer for more space needed.Will that work ?

[@thenotoriousfig]

Shane, would you alter these recommendations after your discussion with Dr. Bugbee? He suggests 1000 PAR from seedling stage onward.

[@gedeuchnixan3830]

One 600W HID in a 4x4 is a bad choice to start with, 4x 150W HID would be easier to handle temp wise and offer better, more equal light output, but I think 4x 125W would do just as fine. Lower temps overall even with four heat sources, you can get closer to the plants and maintain an even par output. Just saying four horses can pull a lot more than one strong one.

[@Brrrbrrrr]

@MIGRO what about 20/4 veg period on photos?

[@SmokeKinz]

Would you start your Auto grow with 550 par or would you slowly get there? What are the recommendet intesitys for Seddling, Verg and Flower?

[@sniperdudeuk]

Wish you would include Par charts for ideal distances for autoflowers ....I could follow your chart for photos and know I am in the right ball park but for autos I have to buy A light meter.

[@webinvader66]

correct me if I'm wrong but does this mean that the array 4 is suitable in a square meter for autoflowers but not enough for photoperiods? 330 watt needed for photos and 230 for autos

[@hambiscuit9943]

So I have 2 tents with bar style LEDs a 4X4 with a 480 watt light and a 3X3 with a 300 watt. I want to use the 3X3 to grow autos on a 18 on 6 off schedule and veg my photos that will go into the 4X4 flower tent. I will grow maybe 2 autos in 5 gals and have a few photos in 1 gal pots vegging. How much should I dim down the 300 watt light in the 3X3 and keep everybody happy ? Or is this just a bad idea to veg photos and run auto in the same tent ? I'm doing pretty good at 75% but sometimes a leaf or two will curl up on the young photos especially if its a sensitive strain. I guess the real question is should I get a par meter and do the math.

[@manavwaddy898]

I've been running up to 55, sometimes even a 60 DLI with autos over 20 hours. Can't complain they can take the upper end with the right conditions (nutrient concentration, leaf surface temps at 81-83°, humidity 65-70% and co2 supplementation). Worst case scenario your buds get slightly foxtaily, but fr they slap in yeild. I always plant more than I need to fill the space and pick only the all stars to fill up my arena. But till day 30 my autos never see more than 30 DLI, then by day 40 when I'm seeing heads they get to around 40 DLI and peak flower I really push them hard. Hard nugs starting to amber by day 65 on 80 day strains. Conesseur shiyt

[@twentytwo138]

It's mostly because of co2 supplementation

[@lolasnchz6094]

top

[@jondoe5532]

so 40 moles of light per day, is that the most they can absorb? i have read and heard it said that after 40 moles of light the returns start to diminish, which would suggest that there are still some gains available after 40 moles.

[@jovialcupid9687]

I this real room or CGI? Look awesome

[@TehMorph]

Can you make video about mobile app ppfd/par meters and compare the stats with real sensor and see which hits the closest?

[@Trrenik0kb]

I recommend to use tent buddy and ppfd meter. Yes it would be helpful alot for us without expensive par meters. I'm with you on this proposal. Some chart with idk. 300w and measurements with apogee and apps. Great idea bro

[@daveselbow9128]

he already has done

[@TehMorph]

@@daveselbow9128 Hey thanks man, found it. I have somehow missed it!

[@JK-qu5nf]

Is it possible to run autos on a 12 hour cycle and get the same results as a 20 hour cycle as long as they receive the same 40+ DLI?

[@graemedevine9651]

Hi Shane, thanks another great video, I've been looking into the frequencies from led light and hps lighting, apparently the high frequencies of led can effect the plant growth, what I found out made me change all my bulbs in my house to the old filament bulbs which are now extremely hard to buy, they didn't give us led to save us energy there's a very sinister plan behind it all.

[@eric8630]

Give me some links.. But yeah, seems kinda weird they put out something that doesnt last very long either.. There seems to be some imperfections with LED all together.. I noticed around here they changed alot of the street lights to LED and it hasnt even been a year and 1/4 of them are either burned out or flickering.. And LED bulbs for the house, same shit.. They tend to burn out super quick.. Like not even a full year.. That always made me curious about why would they put this bs out and glorify it.. It saves money for 1 year.. Then you gotta go buy new ones.. Fuck that.. But damn they do keep the electricity down quite well.. So when you say frequencies... You're talking about the 50-60hz that are on damnnear all electronics?? Does it have anything to do with the Shuman Resonance?? Really curious about whay you are talking about...

[@graemedevine9651]

@@eric8630 led run at a very high frequency just like 4k led TVs, that's why everyone is believing this Covid nonsense, they're all MK Ultra d from their 4K Ultra Tell Lie Vision programming, 4 in numerals is M, look up MK Ultra loads of information on it, well if you apply those high frequencies to a plant or insects it has a bad effect, never wonder why there were no little flies stuck to your bumper this summer, the led lights kill them, led street furniture is antennas for the 5g, it's a rabbit you might not want to go down. I hope this helps, if you want to know anymore just ask.

[@eric8630]

@@graemedevine9651 ive done some research on the subjects you speak of.. I thought I heard that it was something with the UV or something.. But some of these LED lights dont emit UV.. So I brushed it off.. But now that you say that, I understand a little bit more.. Gonna check out more of the MK Ultra stuff too.. I thought it was just a cannabis strain lol.. Till I came across the name elsewhere.. But yeah thanks for the info.. I love learning new things, whether it be about growing, lighting, "conspiracy theories" (notice the quotations).. But I believe all media is in on it.. Including YT.. It makes perfect sense.. Especially after watching The Social Dilemma.. But it goes much deeper than just FB.. Its kinda crazy how they like to give us little hints here and there.. Its not even hints anymore.. Its like, "Hey, this is what we are doing and what's going to happen..." And people are just like, "oh.. Interesting.. I need to text my friend and check my fb and watch 15 YT vids before I watch the news and then try to sleep before I have to get up and watch more news before work and..."... Just keeps going.. Idk.. Just crazy to see how much the world has changed in the last 15 - 20 years... Even more so the last 5 years or so

[@graemedevine9651]

@@eric8630 society has been dumbed down, poisoned, kept in fear from the structure that's called government and the masses pay them for this service. Government is a service Corporation that tricks you into hiring their services by saying their statutory acts are laws, they hide it all through democracy, well I didnt vote for any of it so it doesn't apply to me, Magistrates court is a stitch up, do not go there its maritime law and you to them are lost at sea. It all starts with the birth certificate, your mother is the informant, hope this helps.

[@davedennison7386]

Ive lived in the same house for 20 yrs and could probably count on one hand the amout of led bulbs that ive replaced....proper sinister....

[@pawelk3702]

DLI VPD FIRE!!!!

[@DB-vl9ob]

How about using ppfd?

[@Dubslag]

😳 no wonder my autos look pissed

[@kevinbjelland3745]

Peoples 2nd issue is air flow i belive you are the, the person to explain it for them. most run over powerd systems.

[@Budsmokenpimp1]

So in a 4x4 with autos what would be the best wattage of a light would to give you the best bang for the buck? Im currently running a VIVOSUN 4000. pulling just at 400 watts. It's a nice light but i don't feel it covers that 4x4 like it should... Love all your videos and info!

[@NoGreedSeeds]

A 400 in a 4x4 is perfect. Should be getting nice tight buds if everything else is dialed in. 💚💚💚✌️🥳

[@bodyguard2301]

@@NoGreedSeeds Would 4 VS 1000 be better, than 1 VS 4000 in the 4x4 as one can move and spread the coverage area more evenly?

[@Trrenik0kb]

There is a standard recommendations for par levels. I dont think there's much difference for autos or photos. Seedlings 200-400 Vegetative 400-600 Flower 600-900 If you are in this range, you should be fine. Autos of photos.

[@stangcobra592]

600 is too high/not necessary for veg..

[@Trrenik0kb]

@@stangcobra592 yes, it is not necessary. But if you want to help reduce internodal spacing, 600 is excellent. also you speeding up the growth. More light, better photosynthesis = more sugar = more food = better growth. At least in my case. Cheers

[@1TheWhiteKnight1]

@@Trrenik0kb as long as there’s enough CO2, otherwise too much LED light can stress out plants compared to HPS hence why you see purple stems so often.

[@ozanturan9576]

This is only true if you are going with 18/6 veg and 12/12 flowering photoperiod light schedule. Most people give autos 20/4 light from seed to harvest, 400-600 par 20 hours of light can cause light burn at veg stage and slow down the photosynthesis without supplemental co2, same goes for 20 hours 600-900 par at flowering stage.

[@Trrenik0kb]

@@ozanturan9576 it depends. I used to put seedlings as soon as they open on direct sun during mid summer without problems. It is all strain wise. I grow sativas on 600 in vege with no problems while some indicas cannot withstand that. I'm not saying that 600 is a must. I wrote from 400-600. 600 being close to max option obviously. And regarding co2, again it depends on manny things. You can run 900 in flower without it. Master growers i know introducing co2 above 1100. There's new video from tnb with lex hosting with nice graph for using co2. And for stress from light,again is exclusively strain dependant. Clearly sativas need much more light than indicas, no?

[@420somewhereG]

✊🏻✊🏻✊🏻🇮🇪

[@AlinFlair]

Awesome content, but your volume in all videos is super low...

[@raineman1118]

I prefure photo. I grow for potency.

[@Abthebest13]

i was runnoing my leds at around the recomended efficency. but tbh i find you can go lower for sure

[@NoGreedSeeds]

Great professional content as always. 💚💚💚 wondering where CMH would fall in there, between the leds and HPS? My takeaway is that it’s White and red for top efficiency. Informative! I don’t mess with autos, tho some say I should. Since they don’t seem to require the intensity, I think I may set up some to grow in the corners of my veg tent. More experiments, 1 gallon hydro pots!

[@MIGROLIGHT]

CMH is also about 1.4 usable PPF per watt so about the same as HPS

[@dinero3255]

Is this in the flower cycle or the entire grow

[@MIGROLIGHT]

Hi, For the flower cycle. Thanks

[@darrenholden4732]

Cheers for this interesting topic. I never knew that, but it makes sense. Please could you review this budget light from Amazon? It's only £130 but it has Samsung diodes and a meanwel driver. It's called FUKEA 2000W LED Grow Light Full Spectrum. I do appreciate that you'll have hundreds of test requests. Love the posts!

[@twentytwo138]

I don't know about FUKEA. I think the FUKUBISOFT 70000 watts sq/ft m2/JuMol kmp/h3 is a better choice.

[@mctbaggins2084]

I guess this is for flowering.

[@jwpercy]

I am about to start my first grow in a 4x4 tent with an HLG 550 R-spec. Given the relative low levels of blue in the spectrum, should I supplement by hanging a propagation LED strip like the ones from Sunblaster to enhance the blue spectrum and hopefully reduce stretching of inter-nodal lenghts? Or, is this not a concern for this particular light? I have height limitations in the grow space.

[@1SmokedTurkey1]

I did notice my plants getting a bit shorter since using HLG (had blurples before). So, I would try getting more blue in there and see what happens.

[@thomasbarnes6045]

Po

[@rmcnasty7319]

Does that mean Autoflowers need less light par?

[@herban_garden]

Nobody seems to consider DLI with autos. Sucks for them.

[@happyg.444]

Funny how many hrs of light we give them. The longest day (38 degrees Northern Hemisphere), June 21st at 14.5 hrs of total daylight. It doesn't reach 12 hrs/day until Sept 21st. That's 3 months. What's going on? People beginning to harvest last of Sept thru Oct. Exactly what is triggering them to flower? Is it the steady downturn of total hrs, by minutes per day? Is that what a grower should do? I know we flip to 12 all at once. Seems we're missing something.

[@RocketNothing]

I don't really understand what it is that's confusing you there? 12/12 is the turning point of the equinox in the northern or southern hemisphere, the only place it doesn't mark a season change is on the equator where its 12/12 all year around. The further from the equator the plant naturally grows, the longer the daylight hours it prefers. So to get 18 hours of daylight in June you would need to be 60 degrees north of the equator, at the same time the equator would be getting 12 hours of daylight and the north pole would be on 24. Regardless the north pole & 60 degrees north would both get 12/12 at the same times of year; the vernal & autumn equinoxes. So it's very accurate way of detecting the season change, how are you expecting them to do it?

[@RocketNothing]

I guess the most unnatural thing in that equation is its a bit cold for growing cannabis where you get those length hours, but 12/12 for seasonal change is still logical, cannabis is native to places that stay warm in 12/12 days

[@happyg.444]

@@RocketNothing That's not what I'm saying. If I start and grow the plants on 14 hrs of light. They are not gonna flower at 14, right? Now, if I decrease the light 1 or 2 mins per day, is this gonna be enough to trigger flower and how long would it take for the plant to recognize the decrease in light?? Understand what I am asking? I promise you they will start flowering way before they reach 12 hrs of light only. Does the plant recognize a 1 min drop in light?

[@RocketNothing]

Right, honestly can't answer that, I've never tried extending the bloom photo period, I assumed if it was possible to flower with more than 12 on a non autos then everyone would do that as it would reduce lighting & cooling constraints? Given the amount of growers I deal with who have revag & herming problems in flower I'm guessing you don't get a lot of contingency.

[@happyg.444]

@@RocketNothing That's another thing I was wondering, was the hermi issue people are having. I flipped at 12/12 from 18/6, then have raised it to 14 hrs and they are still flowering. And the ones I started at 14hrs are still vegging on 14, so I am flowering and vegging in the same room at the moment. It's something to think about. And I have no hermi issues.

[@alangodfrey2654]

Quite