This test proved that we could grow earth veg in other solar systems. This video was helpful on my home planet of Glaxnaks-karrrrrr, the first Earth colony, on date 2762. Thank you from the future.
Thank you. I bought lights that adjust up to 4000k for under kitchen cabinets and ended up using others. So i have these and now want to use them for groing a few veg. I keep reading that 4000 is not enough. This video helps me to at least get started. I can move up if I can get the rest of the "system" situated. Not growing for sale, just for salads and soups in Michigan winters. Thanks again.
While a higher kelvin (more blue light) typically produce slightly more compact plants, an adequate light intensity is more important. As long as enough light is provided, most hobbyist growers will be very happy with the results from both a 2700k lamp, a 6500k lamp, and anything in between. Happy farming!
I definitely can see the 4000k produced better results. Better leaf color and more compact growth. There isnt much difference between 4k and 3k..use 6500k next time and results will be much better
Me encantaron tus videos, el de la comparación de los materiales reflejantes me fue muy útil y de mucha ayuda. Veo algunos comentarios negativos y la verdad espero no los tomes en cuenta porque la mayoria de las personas quieren criticar de forma negativa el trabajo de otros cuando ellos no hacen ni aportan nada. Es una pena que ya no hayas creado contenido nuevo desde ya mucho tiempo atrás porque creo ibas por muy buen camino y tus videos iban siendo cada vez mejores. Espero volver a saber de ti y tus aportaciones en youtube ya que pocas personas hablan de forma tan detallada y minuciosa del manejo de la iluminación en las plantas. Te dejo un abrazo fuerte. Por cierto te escribo en español para que tengas presente que personas de muchos lados en el mundo podrían estarte viendo y encontrando la información que necesitan para sus proyectos. Andrea.
Awesome video! I just bought a 4000k light to help out a Thai constellation Monstera I was gifted for my birthday. This was a very helpful comparison👍🏻
Color temp and actual photosynthetically active radiation aren't entirely correlated. There are two fairly narrow wavelength ranges of light that most effectively produce photosynthesis, one is blue and the other red. Different lights of the same color temp typically have different mixture of those wavelength. 4000k actually falls into what is generally the worst in terms of PAR being not especially high in either the red or blue wavelengths plants need but higher in the green part of the spectrum which is virtually useless to plants. 2700k is typically decently high in the red while 5500k and 6500k are good in the blue region.
Hey , very interesting and very good video 🙂👍 We can clearly see on these lettuces that a colder color temperature ( higher 450nm wavelength) promotes the production of anthocyanins ( as seen on cannabis with cool color temperature LEDs, or with the addition of 450nm blue or 365-400nm UVA LEDs ) , as well as a more stocky structure and higher leaf production. Thank you for this very interesting comparison !
I'm growing Basil in a hydroponic 27-gallon container. What is my best option for lighting? I'm using GE Grow LED Light Bulb, but my Basil is not doing good and keep getting worst.
Yup, definitely test a 6500k against 3 or 4000k. I’ve been growing Jalapeños for the first time. I started with just 4000k leds. The early growth was fine but started to deteriorate. I then switched to 50% 4000k and 50% 6500k. This has resulted in a great improvement with more lush growth and much less leaf curl.
@@LEDTonic Hi there did you get around to that test by chance? The more extreme difference would be interesting. Thanks for the original video it confirmed my own expectations.
great video. thanks for your effort. i just planted my first lettuce under 50w 4000k shop led light i got for free. im just not sure how far from canopy to set them up. seeds just yesterday emerged from soil.
@@LEDTonic hey thank you for quick replay, i replied also, but obviously my comment got deleted. well i have disano 962 Hydro LED, 120cm long and 50w of power.
@@mihanivazn2373 I estimate that it covers an area that is about as long as the lamp and upwards 12"/30cm wide at a distance off 10-12" with ok intensity for young plants and leafy greens. Confining the light with white or reflective walls will help a lot as well. Especially in the outer edges. Good luck and happy farming :-) Max LEDTonic
@@LEDTonic great, thank you, i assumed the same, did measurements with lux meter, but i wasnt exactly sure what lettuce like :) yeah fruity veggies need warmer and stronger light. Atm I have arugula and lettuce and they already putting out first true leafs. But spinach never sprouted, maybe coz i dried soil too much one day. thanks again.
That is true! The Q2 is using Samsung lm561c diodes and all spectrums can be found in the spec sheet on Samsung's website. Below is a direct link. The spectrums can be found on page 21: cdn.samsung.com/led/file/resource/2020/03/Data_Sheet_LM561C_CRI80_Rev.9.0.pdf Here is a screenshot of the spectrums if someone doesn't want to scroll through 21 pages: i.imgur.com/a9GowyF.png Thanks for your comment and happy farming! Max LEDTonic
Your plants are leggy. When you start your seeds, have the light 3 to 6 inches from the soil. As the plants grow, raise the light. You will see fuller plants. I have a market garden and I start seeds indoors for spring. Leggy plants are a no go for us. Right when the first leave touches the light, raise 2 inches. Peace!!!!
PAR means photosynthetically active radiation and is a specific part of the electromagnetic spectrum (400-700nm). Color temperature is measured in kelvin and is a tool used to describe how blueish och redish we experience the light to be. Yes, a higher kelvin means more blue, and vice versa. I hope this gave some clarity. Have an awesome day!
Thanks for the video but this test isn't a very good one. I think to best see results you should do one under 3K, one 4K during veg and then change out the 4K for a 3K during flowe to se ethe true difference when compared to an ideal environment
You need to redesign your panels. They waste way too much overhead space. When using shelving units this product becomes unfeasible. I'd imagine others are not buying it for that reason, too. Flat top that can be shoved into a tight shelf space. I'd rather have a brick near the power socket than on the panel itself since at least then the panel can fit a shelf.
Hey, Thanks for the feedback! While it work fairly well, the Q2 isn't primarily designed to illuminate a multi-tier shelving unit and we agree that the lamp's height isn't ideal for this type of situation. It depends on the shape and material of the shelf, but it is possible to fit the lamp's base through a hole and have the lamp holder fitted above, rather than below. Here's a picture from a grow closet we just built where the Q2 is illuminating the top "floor" of the closet. i.imgur.com/3aj1fhX.jpg We'll post a how-to video here on YT in the next couple of days, so stick around if interested :-) Thanks for your comment and have an awesome day! Max LEDTonic
Howdy! The blue lamp is 4000k but I agree it may look a bit bluer than that in some shots. Cameras can be skewing and colors can quickly change when intensity and angle changes. Auto focus and auto brightness does also change the result a bit. Thanks for watching! :-)
Howdy! We can easily calculate the cost of different photoperiods over 45 days with the US average of 13 cents per kilowatt-hour. 1000 watts for one hour = 1 kilowatt-hour = 13 cents 500 watts for two hours = 1 kilowatt-hour = 13 cents 70 watts for 14.3 hours = 1 kilowatt-hour = 13 cents 35 watts for 28.6 hours = 1 kilowatt-hour = 13 cents One LEDTonic Q2 draws around 35 watts. We used two lamps in this experiment to compare the result of different spectrums but two Q2 lamps are a bit excessive and one Q2 would emit enough light to produce good results. Wattage * (photoperiod * days) * US average = cost 0.070*(24*45)*0.13 = $9.8 0.070*(20*45)*0.13 = $8.2 0.070*(16*45)*0.13 = $6.5 0.070*(12*45)*0.13 = $4.9 Our photoperiod was 14 hours which totals $5.7 for two lamps and $2.8 for one lamp. I believe the fan we used in this experiment drew between 1-4 watts as well, so that adds a couple of cents to the total. I hope the above was helpful :-) Happy farming!
This test proved that we could grow earth veg in other solar systems. This video was helpful on my home planet of Glaxnaks-karrrrrr, the first Earth colony, on date 2762. Thank you from the future.
Thank you. I bought lights that adjust up to 4000k for under kitchen cabinets and ended up using others. So i have these and now want to use them for groing a few veg. I keep reading that 4000 is not enough. This video helps me to at least get started. I can move up if I can get the rest of the "system" situated. Not growing for sale, just for salads and soups in Michigan winters. Thanks again.
While a higher kelvin (more blue light) typically produce slightly more compact plants, an adequate light intensity is more important. As long as enough light is provided, most hobbyist growers will be very happy with the results from both a 2700k lamp, a 6500k lamp, and anything in between.
Happy farming!
I definitely can see the 4000k produced better results. Better leaf color and more compact growth.
There isnt much difference between 4k and 3k..use 6500k next time and results will be much better
It's far more complicated than that
Me encantaron tus videos, el de la comparación de los materiales reflejantes me fue muy útil y de mucha ayuda. Veo algunos comentarios negativos y la verdad espero no los tomes en cuenta porque la mayoria de las personas quieren criticar de forma negativa el trabajo de otros cuando ellos no hacen ni aportan nada. Es una pena que ya no hayas creado contenido nuevo desde ya mucho tiempo atrás porque creo ibas por muy buen camino y tus videos iban siendo cada vez mejores. Espero volver a saber de ti y tus aportaciones en youtube ya que pocas personas hablan de forma tan detallada y minuciosa del manejo de la iluminación en las plantas. Te dejo un abrazo fuerte. Por cierto te escribo en español para que tengas presente que personas de muchos lados en el mundo podrían estarte viendo y encontrando la información que necesitan para sus proyectos. Andrea.
Interesting. It would be more interesting to see 3000K vs 6500K.
Yeah
Awesome video! I just bought a 4000k light to help out a Thai constellation Monstera I was gifted for my birthday. This was a very helpful comparison👍🏻
Color temp and actual photosynthetically active radiation aren't entirely correlated.
There are two fairly narrow wavelength ranges of light that most effectively produce photosynthesis, one is blue and the other red. Different lights of the same color temp typically have different mixture of those wavelength.
4000k actually falls into what is generally the worst in terms of PAR being not especially high in either the red or blue wavelengths plants need but higher in the green part of the spectrum which is virtually useless to plants. 2700k is typically decently high in the red while 5500k and 6500k are good in the blue region.
Hey , very interesting and very good video 🙂👍 We can clearly see on these lettuces that a colder color temperature ( higher 450nm wavelength) promotes the production of anthocyanins ( as seen on cannabis with cool color temperature LEDs, or with the addition of 450nm blue or 365-400nm UVA LEDs ) , as well as a more stocky structure and higher leaf production. Thank you for this very interesting comparison !
Hey great video! I would love to see the difference between 400k and say 6500k
I'm growing Basil in a hydroponic 27-gallon container. What is my best option for lighting? I'm using GE Grow LED Light Bulb, but my Basil is not doing good and keep getting worst.
I like these testing videos. My led lights is 4000k.
3:90 when plants look like that in my garden i say bad year
I would really like to know the difference between 3000k to 6000k in tomatoes and such
Hello!
We'll see if we can arrange a test with 6500k in the future. It might take a while before we're able to, though.
@@LEDTonic - I agree... would love to see this test too.
Yup, definitely test a 6500k against 3 or 4000k. I’ve been growing Jalapeños for the first time. I started with just 4000k leds. The early growth was fine but started to deteriorate. I then switched to 50% 4000k and 50% 6500k. This has resulted in a great improvement with more lush growth and much less leaf curl.
@@LEDTonic
Hi there did you get around to that test by chance?
The more extreme difference would be interesting.
Thanks for the original video it confirmed my own expectations.
I’m going to be using my Q2 to start my vegetables for my outdoor garden next year
Very interesting results!
Note you can raise the lights to equal both lights
great video. thanks for your effort. i just planted my first lettuce under 50w 4000k shop led light i got for free. im just not sure how far from canopy to set them up. seeds just yesterday emerged from soil.
Hello!
I may be able to give you an estimate. What's the shape of your lamp and how many tubes does it have?
Max
LEDTonic
@@LEDTonic hey thank you for quick replay, i replied also, but obviously my comment got deleted. well i have disano 962 Hydro LED, 120cm long and 50w of power.
@@mihanivazn2373 I estimate that it covers an area that is about as long as the lamp and upwards 12"/30cm wide at a distance off 10-12" with ok intensity for young plants and leafy greens.
Confining the light with white or reflective walls will help a lot as well. Especially in the outer edges.
Good luck and happy farming :-)
Max
LEDTonic
@@LEDTonic great, thank you, i assumed the same, did measurements with lux meter, but i wasnt exactly sure what lettuce like :) yeah fruity veggies need warmer and stronger light. Atm I have arugula and lettuce and they already putting out first true leafs. But spinach never sprouted, maybe coz i dried soil too much one day. thanks again.
its better if you can show the colour spectrum of those light as well.
That is true!
The Q2 is using Samsung lm561c diodes and all spectrums can be found in the spec sheet on Samsung's website. Below is a direct link. The spectrums can be found on page 21:
cdn.samsung.com/led/file/resource/2020/03/Data_Sheet_LM561C_CRI80_Rev.9.0.pdf
Here is a screenshot of the spectrums if someone doesn't want to scroll through 21 pages:
i.imgur.com/a9GowyF.png
Thanks for your comment and happy farming!
Max
LEDTonic
Your plants are leggy. When you start your seeds, have the light 3 to 6 inches from the soil. As the plants grow, raise the light. You will see fuller plants. I have a market garden and I start seeds indoors for spring. Leggy plants are a no go for us. Right when the first leave touches the light, raise 2 inches.
Peace!!!!
Color temperature is related to PAR light? 3000k will have more red spectrum and 6500k will have more blue spectrum?
PAR means photosynthetically active radiation and is a specific part of the electromagnetic spectrum (400-700nm). Color temperature is measured in kelvin and is a tool used to describe how blueish och redish we experience the light to be.
Yes, a higher kelvin means more blue, and vice versa.
I hope this gave some clarity.
Have an awesome day!
Thank you very much, Iooks like your basil suffered from phosphorus deficiency
....have u ever grown with 6500K?
Was wondering about 5000k . Good info and vid
We're hoping to test and compare with a higher kelvin in the not too distant future.
Thanks for your comment.
Stay tuned and happy farming! :-)
@@LEDTonic Great video: yes, I think also test 3000k and 5000k will be a good idea because 3000k and 4000k have close spectrum
what were the lumens of your lights?
Hello,
Each lamp is around 5300 lumens. You can find more information and specifics here:
www.ledtonic.com/products/q2-led-grow-light
Thanks for the video but this test isn't a very good one. I think to best see results you should do one under 3K, one 4K during veg and then change out the 4K for a 3K during flowe to se ethe true difference when compared to an ideal environment
Теперь ждём сравнение 2700 и 4000К
I know with fluorescents I did best with 6400k.
You need to redesign your panels. They waste way too much overhead space. When using shelving units this product becomes unfeasible. I'd imagine others are not buying it for that reason, too. Flat top that can be shoved into a tight shelf space. I'd rather have a brick near the power socket than on the panel itself since at least then the panel can fit a shelf.
Hey,
Thanks for the feedback! While it work fairly well, the Q2 isn't primarily designed to illuminate a multi-tier shelving unit and we agree that the lamp's height isn't ideal for this type of situation.
It depends on the shape and material of the shelf, but it is possible to fit the lamp's base through a hole and have the lamp holder fitted above, rather than below. Here's a picture from a grow closet we just built where the Q2 is illuminating the top "floor" of the closet.
i.imgur.com/3aj1fhX.jpg
We'll post a how-to video here on YT in the next couple of days, so stick around if interested :-)
Thanks for your comment and have an awesome day!
Max
LEDTonic
@@LEDTonic Thank you!
@@SummerSausage1 The video is public now. Have a great weekend!
ua-cam.com/video/MYExmWNFpKo/v-deo.html
that 4000k in intro is too blue its more like 10000k
Howdy! The blue lamp is 4000k but I agree it may look a bit bluer than that in some shots. Cameras can be skewing and colors can quickly change when intensity and angle changes. Auto focus and auto brightness does also change the result a bit.
Thanks for watching! :-)
so that cost about 30 dollars to grow in power.
Howdy!
We can easily calculate the cost of different photoperiods over 45 days with the US average of 13 cents per kilowatt-hour.
1000 watts for one hour = 1 kilowatt-hour = 13 cents
500 watts for two hours = 1 kilowatt-hour = 13 cents
70 watts for 14.3 hours = 1 kilowatt-hour = 13 cents
35 watts for 28.6 hours = 1 kilowatt-hour = 13 cents
One LEDTonic Q2 draws around 35 watts. We used two lamps in this experiment to compare the result of different spectrums but two Q2 lamps are a bit excessive and one Q2 would emit enough light to produce good results.
Wattage * (photoperiod * days) * US average = cost
0.070*(24*45)*0.13 = $9.8
0.070*(20*45)*0.13 = $8.2
0.070*(16*45)*0.13 = $6.5
0.070*(12*45)*0.13 = $4.9
Our photoperiod was 14 hours which totals $5.7 for two lamps and $2.8 for one lamp.
I believe the fan we used in this experiment drew between 1-4 watts as well, so that adds a couple of cents to the total.
I hope the above was helpful :-)
Happy farming!
@@LEDTonic so 8 dollars in 45 days?