LED lighting

[Hazy Neville]

Check out Seymour-Buds grow using leds https://www.autoflower.net/forums/f5/au ... -4467.html

Thanks for the link...
Something to note is that the plant was an untested auto, and two lamps were used.
In the pics of the plant in vegetation, I think there was too much red light, but then again it was an AUTO and would grow regardless.
Just saying if it were a regular plant, I don't think the veg results would have been the same. My speculation is based on science - red spectrum light not as conducive to growth as blue spectrum light, and the opposite is true for flowering. Botany 101

Happy trails...

Spot on Uncle Ron.... There is a quite revolution going on in the world of Auto's at the moment, yields and strenght are up, prices coming down. Do you grow auto's ?

[Stanky Danky]

BUMP

Was looking into going LED for my new setup and was doing a little research. Found out that LED makers have made huge strides in the last couple of years in dialing them in to put out the correct wavelengths. The newer generations are supposedly far superior to what was available just a few years ago. Found an interesting youtube video that uses a sprectoradiometer to show a 330W LED far outperform a 600W HPS in the blue and red wavelengths.

[Stanky Danky]

After doing a little shopping around I've decided I'm going to buy two 120W Star Ship LED's from a local grow shop. According to the website each unit puts out more usable light than a 600W HPS. I'm a tad bit skeptical about this claim, but if it's true I'll be growing under more usable light than 1,200W of HPS with the electricity bill of 240W. Anyway here's a couple pics and a rundown of what the site has to say about their product.



120 watt LED Grow Light with TRI-BAND Technology! Generation 3, Best Design Yet, OUTGROWS ALL OTHERS. This is not the same old designed 120 watt LED that the quick-buck sellers are offering. This is OUR latest design, custom engineered and manufactured to our growing specifications. This unit includes spectrums that ALL others MISS!

A little background:
In the past we have sold LED grow light units made by others, (the same ones still being sold by others). Some of our customers had decent results, others were mostly disappointed. We realized that the LED light was a big part of the future of indoor growing, and we decided it was about time that somebody produced one that actually worked. We enlisted the help of a PHD Botanist (see our website) to get to the root of why the previous LED lights were not working so well, and what could be done to improve them.

We discovered many things in the past 18 months in our engineering research:

Other LED Grow Lights provide the wrong spectrum for plant growth, the spectrums are “close” but not a match to those required for maximum photosynthesis.
Other LED Grow Lights were the same item, produced at the same Asian factory, just with different brand names.
The marketing for these units was vastly different depending on the seller, but most sellers stretched the truth (to say the least) when advertising the results and the spectrums produced.
The other LED Grow Lights use of the wrong spectrums of LED was no accident; it was a cost saving measure. Buying the correct spectrum LED is much more expensive than buying an “off the shelf” LED used for traffic signals.

Why use our 120 watt LED GROW LIGHT with Tri-Band Technology to grow plants?
Up to now the only popular choice for indoor growers has been Sodium (HPS) or Halide (MH) lights which both produce a very wide band of lighting. However less than 10% of a Sodium or Halide lamps output is actually used by the plant.

With the advent of LED lighting, we can custom tailor the output of the lamp to match exactly the band of light required for Chlorophyll production!

What does all this mean?
This means that almost 100% of the power input for our LED GROW LIGHT is used for plant production.

Here are some of the benefits of lower heat levels:

- No HEAT SIGNATURE detectable by infrared cameras.
- Less heat means lower grow room temperatures and lower humidity, making controlling the micro-environment of your grow room easier to maintain properly
- No high temperature lights to worry about. No hot light bulbs or cumbersome, heavy and hot ballast enclosures either.


The concept behind the Tri-Band 120 watt LED GROW LIGHT is simple – it uses highly efficient 3 watt LED’s, which are the very specialized exact spectrums required for photosynthesis. The 3 watt LED use wide angle directional bulbs for a wide area of coverage. The 3 watt LED is one of the most efficient light sources in the world. By using only the spectrums required for plant growth, no light is wasted generating spectrums of light that do nothing for a plants growth – such as green light. Also the directional LED’s ensure 100% of the light is pointed downwards – they do not rely upon reflective materials to direct the light.

The High Power Tri-Band 120 watt LED GROW LIGHT can be used by itself for all cycles of plant growth (covers approximately 12-20 square feet). It can also be combined with fluorescent, H.I.D. (HPS,MH) lighting as well. It's perfect for indoor growers who want a low heat/high output system that uses very little electricity. L.E.D.'s are the future of grow lights available today!

The Tri-Band 120 watt LED GROW LIGHT is the most revolutionary plant lighting product since the invention of the High Intensity Discharge (H.I.D.) lamp and ballast. Consuming only 120 watts of power and producing virtually no heat, the Tri-Band 120 watt LED GROW LIGHT boasts light intensity and growth rates exceeding that of a 600W HPS.

Light Emitting Diode (L.E.D.) technology is the absolute newest technology in plant growth! These lights represent the cutting edge of horticultural lighting. LED lights are currently being used by NASA for growing plants in outer space!

[USbongLord]

when i get to outer space ill use em then

[Stanky Danky]

[Willjay]

Looking forward to a grow report,

[Stanky Danky]

Looking forward to a grow report,

Yeah, I'm interested to see what kind of yield I can pull off a four plant bumper crop under 240W.

[Addlestoner]

Led's do a good job of vegging but i find they grow fluffy lose buds whereas hps gives u that density.

[sam]

Yes please keep us informed about your LED grow. I am in the hydro produce growing buisness and have a friend that grows leaf lettuce, arugula and other mixed greens with great luck under LEDs indoors. He says they just do not have the light intensity to grow anything else. I have also personaly talked to comercial LED salesmen at large grow seminars about there products and they say they are still several years away from being able to grow anything else but plants that can get by on low intensity light.

[Stanky Danky]

Led's do a good job of vegging but i find they grow fluffy lose buds whereas hps gives u that density.

What brand and how many watts of LED did you use? I watched a youtube video a while back that I can't seem to find anymore, but they did a side by side grow comparison under the same amount of watts, but tweaked the spectrum slightly for the four separate grows. In the end the plant that had the best spectrum was nearly double the size of the plant of that had the worst spectrum. It's my understanding that all the older generation LED's had the wrong spectrum and that the newer LED's have a much better spectrum to optimize growth. If that thread that Hazy Neville linked earlier in the thread with a 356 gram yield off one plant is any indication, LED's are fully capable of high yields.

[treetop]

n/l

[yashpalaegis]

Light-emitting diodes are used in applications as diverse as aviation lighting, automotive lighting, advertising, general lighting, and traffic signals.As LED materials technology grew more advanced, light output rose, while maintaining efficiency and reliability at acceptable levels.

[spidergawd]

Light-emitting diodes are used in applications as diverse as aviation lighting, automotive lighting, advertising, general lighting, and traffic signals.As LED materials technology grew more advanced, light output rose, while maintaining efficiency and reliability at acceptable levels.

What we're after is the right spectrum for growing, my experience with an admittedly fairly cheap unit, was that it vegged well but needed a somewhat different spectrum for the flowering. I see some of the more advanced units are adjustable.

I haven't hit your link because sometimes a one time poster with a web link is spamming, but please join the discussion, any technical input would be welcome.

[treetop]

n/t

[SatoriKarma]

What we're after is the right spectrum for growing, my experience with an admittedly fairly cheap unit, was that it vegged well but needed a somewhat different spectrum for the flowering. I see some of the more advanced units are adjustable.

Spectrum or light intensity?

It's true that plants grow better with more blue spectrum at the vegging stage and more red/orange spectrum in the flowering stage but the major difference is the amount of light intensity required. Flowering plants need significantly more light intensity to flower than to produce vegetative growth. Add in that light intensity diminishes according to the inverse square law (the further it has to travel the less intense it becomes) and the higher height of flowering plants, causing the light to have to travrl further and that's probably what's causing you the problems.

From memory (I don't have the figures to hand) flowering plants need about 4-5 times the light intensity to flower compared to vegging plants which is the primary reason many people have traditionally vegged with fluorescents and flowered with HIDs.

Yes spectrum is important, but in flowering light intensity is the key.