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Peter Grant
I can’t wait for part 2 this is an exciting video, thanks to your experiments I’ve been able to optimize my grow system , thanks for all your hard work Ryan!
This video was about a million times more helpful than Google search was in finding a clear answer
you’re still on Google
google is a chinese style censorship on everything.
@AJ “google search”
And yeah, youtube is always better for complicated answers that dont need a simple yes or no
I would have to agree with you Franklin
Considering you grew lettuce which does NOT flower or produce fruit… its perfectly logical that it DOESNT need red light which is important for flowering and “fruiting”and not vegetation and most full spectrum leds have 60-70% of red led diodes… Just saying.. You should do some fruit grow actually … If you did send a link
SRB NS to say that lettuce doesn’t need red light is false. All plants need red light. The ratio is what matters. https://youtu.be/pgpjACVfLvA
Growing Answers yeah needs little red but most blue
Actually lettuce absolutely flowers, you just want to harvest it before that 🙂
All leaves contain two types of chlorophyll, alpha and beta. One is activated by red light, the other by blue light. But there other biochemical roles for light. For example, plant can react to green light, avoiding that area, probably due to competition with other vegetation. Seeds respond to infrared.
Both chlorophyll A and B has peaks in both blue and red.
The biggest part of this experiment that I find most fascinating is the difference in task due to the lighting. I am interested in seeing the outcome of the next experiment and what plant you will be using.
Really great video. Short, snappy and to the point.
Wondering if you managed to do a cost analysis of electricity, seeds and potting compost per plant vs store bought lettuce.
It is my understanding that 6,500k is the best color temperature for growing. I was surprised that the white light used in this video did so well considering it is at a much cooler color temperature. I would be interested to see a comparison between a 6,500K white light vs the one you used in the video.
Thanks for growing answers!!! Nice to know someone of intelligence is doing some worth while research using these new types of artificial lighting. Thanks and keep up the good work/research. I look forward to watching more of your videos. Ps the time laps was an awsome way to show the difference between the two types of lighting!!!
Wild lactuca species are known for their extreme bitterness, so I think cultivars have been selected to overcome this, and still if you let your lettuce flower you’ll see that it can become a little bitter. So maybe this experiment would be interesting to try with something else like a tomato and try the flavor difference again
Cool video, thanks for posting!
Actually the most important would have been to have them tested to which one had more nutrient value. Visually speaking it appeared to me the white light plants looked much healthier to me.
Great video and its a good starting point, As it becomes more complex and depending on plant and requirements the LED type/wattage and spectrum i have found personally varies so much to get a good end result.
Think science is about having fun and the more people learn the more as a whole we progress towards results 🙂
The red/blue lamps should be considered multi-spectrum and not full spectrum. White lamps are actually full spectrum. It would be interesting to see a comparison with fruiting/flowering plants and non fruiting/flowering plants under 2700K, 4000K, and 5000K LED lamps and compare the results. Nice hands on experiment, thanks.
You have to use clones as a control. Any plant from seed will vary in size depending on the seeds growth potential.
Done something similar on my last grow,purely accidental.Started grow under mars hydro purple,friend gave me a white led spider farmer 5 weeks into grow.Results were beyond belief,best I ever had.This 50/50 mix seems best of all,just my take on things!
Two years later and this video was a million times more helpful than other videos and google searches thank you!
There was more red light in the “white light” LED panel, which caused the leaf to become larger… however, despite the size of the leat, the nutrients/phytochemicals produced in the leaves are pretty constant, so the “bitter” taste in the predominantly blue light was due to these flavors being concentrated into less biomass, but equally healthy leaf as the white-grown, which actually had more red light.
The leaf morphology (size) was affected by the spectrum. The amounts of phytochemicals responsible for taste were not, and in probably equal amounts “per leaf”, but not “per gram”.
I think it would have been important to dehydrate the plants and see their “true” weight. The non-green plant may have been more dense, and technically “larger” than the green one. Then burn the dehydrated mass to extract and weigh the various vitamins (copper, iron, potassium, etc) contained. The reason for the bad taste could have meant more nutrients were present.
He did say hobbyist. I did not see a university style laboratory in this but a nice comparison video on led lighting with lettuce.
@Lost Civility do it right, or don’t do it.
@Kenneth Kline go on then kenneth, show us how its done
Nice. I would be interested to see what the ‘dry mass’ was of both types also. I was thinking that the white light plants may have more water content – perhaps larger or less compact cells and the bitter taste of the RGB plants may be as a result of this. Liked the experiment – well done.
The higher percentage of blue light in your RB led is the reason of higher chlorophyll compared to the RGB led 😉 and blue surpresses leave extension so the leaves were less elongated than RGB because of that, despite the same amount of red.
I appreciate your concise but fact packed video! I’ve been experimenting with different lights for starting seedlings lately and your findings have been really helpful. Will be sure to check out more. Cheers!
WOW! I would have never guessed that! As a kid, I wondered what growing plants under different color glass panes would do, like a stained glass greenhouse type thing, I think I saw it in a dream. Anyway, I would have put my vote on the multi color giving better crops! I’m glad I caught this 🌱 I had a bunch of pink lights priced out on Amazon LOL!😎
I think my neighbors had some tomatoes under pinks.. Maybe different veggies and fruit might like the pinks better? Who knows? This was interesting. Thanks.