There?s a lot of talk surrounding led grow light at the moment, and I think that?s the direction of led plant grow light technology will eventually head towards, given the cost that electricity is expected to cost in the coming years and the pace that led technology is advancing, even NASA are growing with plant led grow lighting, as there compact and also there light spectrum can be tailed to the plants pacific light spectrum needs.
Light-emitting diodes (LED?s) are a promising technology being developed that can also efficiently generate photosynthetic radiation. LED?s can illuminate near the peak light absorption regions of chlorophyll while producing virtually no near-infrared radiation. Is makes led?s potentially the perfect plant led grow light.
? PHOTOSYNTHESES AND PLANT LIGHTS
When it comes to plants, light is king, for plants light is food, the more we give the more they?ll grow,up to a point everything else that we give to plants comes second place, more light equals more yield, until you reach your plants peak light absorption point, beyond this point the extra light can actually be detrimental to the growth of plants,even sun loving ones.
For high-energy plants that flower/ fruit, light is the main turbo charging factor, either outdoors or in an indoor grow room.
? SO WHATS AN LED
Led?s or Light Emitting Diodes are a type of "silicon semiconductor" just like a computer chip that happens to give of light when power is applied.
Led grow light have one very big advantage over other lights such as fluorescents, metal halides, and high pressure sodium bulbs and that?s because energy is not waited so much, by heating up the gases that give of light, within the led bulbs.
? EXAMPLES OF ENERGY EFFICIENCY
High output led 86% efficient
High pressure sodium 64% efficient
Metal halide 46% efficient
Fusion sulphur 43% efficient
Fluorescents 30% efficient
? WHY RED AND BLUE LED GROW LIGHT ARRAYS!
For plants its important to have a mix of red and blue from the light spectrum, its these light wavelengths that make up part of the broad light spectrum that together with the other parts make up white light, that we see around us ?remember at school? when light pases though a prism that separates out the spectrum of light.
Traditional grow lighting not only waists energy as heat, but also traditional bulbs give of a broad spectrum of light which we now no plants don?t use each part of the spectrum in equal amounts,even though common sense says otherwise.
When led grow light spectrum is carefully matched to the plants needs, provides optimal plant growth. Too much of either can cause undesirable results. blue light is the primary energy source for plants. Everything from growth, to fruiting is driven by the energy received from blue light. Blue light is responsible for regulating stomata opening (plant breathing), phototropism (growth towards light) and photo morphogenesis (plant shape).
Red/orange light is also in portent for growth, but in a much smaller amount,but still in portent none the less,its in portents lies in the flowering/fruiting cycle, although plants will still flower without it, although the resulting flowers will be smaller in size and maybe a little deformed in shape,so getting the right proportions in led grow light is really crucial for good plant growth and flowering
?Examples of Some cheap led grow light units I?ve seen about
These are just some examples of cheap led plant grow lighting from china, not that I'm against cheap Chinese lights, but the ones below and others like them have not had the wavelengths matched to the plants needs.
. CROP CIRCLE LED GROW LIGHT, 40 POUNDS
simple screw style base to simple fit in any standard house hold incandescent socket. In addition, the Crop Circle led grow light is small, portable and easy to aim. If you already posses an incandescent plant light the CVHZ-G73 can easily be retrofitted, "AS YOU CAN SEE, NO INFO ON LIGHT SPECTRUM"
? 225 LED PANEL LED PLANT GROW LIGHT 55 POUNDS
Grow better, healthier plants AND save time and costs? Yes, this really IS possible, thanks to this red and blue blended light panel, which is for use with all hydroponically grown plants. Hmm tiny little LEDs, ?I smell a rat?.
HERES THE ONLY COMPANY THAT I,VE FOUND THAT SOUNDS LIKE THEIR MAKING THE EFFORT TO MAKE A USEFUL LED GROW LIGHT, AND NOT JUST KNOCKING ANY OLD LED PLANT GROW LIGHT UNIT OUT FOR A QUICK BUCK. growgrowinternational.com "THESE UNIT HAVE NINE DIFFERENT SPECTRUM PEAKS"
These LED growing light units are tailored to the plant Spectra needs, which creates the photosynthesis in plant life. The most important organisms for photosynthesis are chlorophyll-a and chlorophyll-b, b-carotene and xanthofyl (phycoerythrin + phycocyanin).
As you can see from the chart below, Essential in this ratio is the wavelengths that are adjusted to have an ideal ratio in comparison to each other. This creates a synergy, which makes the stomata open up more and the plant is able to absorb more CO2.
? WHICH LIGHT WAVELENGTHS DO PLANTS LOVE
The LED Spectra wavelengths (nanometers) which creates the photosynthesis in plantlife. The most important photosynthesis organisms are chlorophyll-a and chlorophyll-b, b-carotene and xanthofyl (phycoerythrin + phycocyanin).
Essential in this ratio is the wavelengths that are adjusted to have an ideal ratio for optimum plant absorption.
This creates a sort of synergy which makes the (stomata)theses are the lunges of your plants that are on the underside of leafs so that their protected from being clogged up by dust and other debris,an ideal light ratio that allows the stomata to open up better and the plant is able to absorb more CO2.
? WHAT NASA THINKS
According to no other than NASA program called ?Advanced Life Support (ALS)? Past tests have also included separate LED arrays filled with a given peak wavelength of red (664, 666, 676, 688 nanometers) LED?s. Each LED array contained single rows of blue LED?s (474 nanometers) evenly distributed within the multiple rows of red LED?s. Current research has begun to measure the relative stoichiometry of photo system I and II reaction centers in response to light quality. When given a sufficient quantity and certain quality of light, plants can produce food, regenerate oxygen and give, potentially massive yields, if all the other needs are met.
As you may have seen from privies use pages on led grow lights, that I also want in on the action too, so for my birthday I received 100 red LEDs and 10 blue LEDs and together with a pcb board and some resisters, that I?ll buy myself very soon, hope to have my very own led growing lights, that I hope will yield some sort of results, and with a little experimenting ? fooling round, my other half would say? with the mix of led?s, I?ll have my very own led plant grow light, also one of my friend ? yes I do have some? is a lighting engineer, who?s got a light output monitoring program and module that plugs into a pc, so with fingers crossed I?ll have a led grow light schematics ready for you ? when I have time? the how to section of this site, although in return I?d like some pics of your led light arrays, so others can see what can be achieved , with just a fraction of what these led grow lamps cost normally.
Although now that I?ve spent many hours researching led light wavelengths it now seams that the leds ?my other half bought? are not what?s really needed, but rather what?s really needed is the new high power LEDs, which are really expensive to buy at the moment, plus I?ll be in the dog house if I don?t use the 10mm leds, that I asked for, so ill give them a try, just need to order the PCB led circuit board strip to mount my 10mm leds on, and when built I?ll use it in my stealth hydroponics computer tower, as not much heat will be generated from the led array, making it ideal for such a small space.
. Technical Data: for my 10mm led?s
Technology: 4 Chip LEDCase: 10mms water clearViewing Angle: 40?Power: 3,4VCurrent: 80mA type.WaveLength: 470nm (blue)Maximum Intensity / Brightness: 6 Lumen
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