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What's all this talk about PAR? Is it important to plants?

What is PAR and is it important in relation to plants or horticulture in anyway?  Growers that are in the business of cultivating any types of medical plants or other plants in general should learn and understand about PAR so you can obtain healthier and more happier plants to give you back what you desire, plus some.  First of all, you probably already know what PAR stands for, but to recap things PAR stands for Photosynthetically Active Radiation which technically refers to the number of light quanta (or particles of light called photons) that emit in a square meter over the time period of one second exactly that are between the wavelengths of 400nm and 700nm.  What is a "nm"?  A nm is a short form for "nanometer" which is exactly one billionth of a meter.  To give you an example, if you were to have some sort of stopwatch handy you can hit start and exactly 1 second later hit stop.  That's PAR in a nutshell.  

So you ask how this relates to growing plants? First of all lets take a look at how PAR applies to every single plant on the planet earth, lets take a look at the charts below first, which shows you what our human eyes can visually see in nanometers:



The chart above shows the spectrum we are talking about and some of the uses of certain bands throughout the light spectrum.  If you have a look below at the next chart, this shows what spectrum our human eyes can see, and what a plant can "see" or use for proper photosynthesis:

 Human eye visibility chart light spectrum and PAR plant photosynthesis graph

 As you can see from the above charts, the human eye ranges somewhere in the middle of the spectrum, right around the center.  A plant however, uses the entire spectrum and can absorb (see it) all across the entire spectrum above, and at different nanometers it can be more useful than others during various stages of a plants life.  The human eye is measured by intensity, lux and lumens.  Power is measured by the useful absorption intesity of the colors.

So, if a plants lighting is lets say measured by colors and not intensity why would our "Signature Series" of grow light emit more whites than the majority of the LED grow lights out there that emit only red and blue?   Well, if light intensity was the only measurable quality for light, then the best light for any grow application would most likley be a HPS (High Pressure Sodium). The problem is with the HPS is that plants are more concerned about 'light quality'.  This is where other light sources fall short when compared to Grow HIDS and Fluorescent lights.. they are all limited by their own technology in delivering the full color range above that plants require for proper photosynthesis.  

Our "Signature Series" (Infuzer Maxx+) of professional grow lights deliver that FULL spectrum that the plants are looking for.  Our LEDs are specially customized and manufactured for the exact spectrums that mirror the sun itself at different times of the season, for instance spring where the blue side of the spectrum is more absorbed by the plants and the fall season where the red side of the spectrum is absorbed more by the plants.   The plants will continue to use the full range of the spectrum throughout their entire life cycle.  Our Signature Series Infuzer Maxx+ line-up delivers that full spectrum beyond just the reds and blues, which mimicks the sun as in nature, and it delivers the intensity that all plants thrive on, especially the light thirsty plants that thrive on as much light as they can get.  Reds and blues will work in the proper spectrum, and even better if they are accompanied by other spectrums to assist proper photosynthesis by the plants.  Also, for plants, its not always about the intensity of the light, the plants thrive for quality of the light and spectrum produced by the light.  The quality of the light itself is very important to a plant and is absolutley critical if you seek healthy, vigorous plants that grow to their full potential.

 Full Spectrum GROW LIGHT Medical Cannabis Best LED Light

Above is a picture of the comparable light spectrum that of our "Grow Series" of professional led grow lights emits, which is great for PAR value as our lights are custom designed with the added PAR spectrum ranges that plants love.  And below, is a pictrue of the comparable light emitted from our "Signature Series" Infuzer Maxx+ series:

 Intenze LED Grow Lights - Worlds Most Advanced LED Grow Light

As you can tell from the picture above when you compare them, they are quite different.  Our signature series was developed by our experts to mimick the natural sunlight, with powerful intensity that some growers require to penetrate the canopy deeply and still give great PAR to your plants below the canopy - very few LED grow lights can do that, but our signature series has no troubles getting deep into the canopy, we dont recommend closer than 18" due to the intensity of the light spectrum which can be damaging to plants if placed to close!  Cheap LED lights can go close, some need to be close to work, however you cannot put any of our Signature Series closer than 18" to the top of the canopy, especially during the flowering cycle.

The unique thing about plants in general, is that each crop will have specific needs and requirements to produce a beautiful healthy plant.  There are some crops for instance such as lettuce and other non-flowering plant species that seem to absorb more light spectrum near the lower nanometer range (see above).  When a seed starts propagation it uses all colors in the lower nanometer range also.  When you are dealing with plants that do flower, such as tomatoes, peppers and medical cannabis - they will all use and benefit more during their flowering stage of a value of nanometers near the higher end (660nm or thereabouts).

We have a team of experts who all take part in designing our Signature Series led grow lights and we have these experts reviewing and absorbing research as to learn the plants required spectrums, PAR values and Kelvin temperature that we can make use of and develop superior high quality LED grow lights for commercial gardeners and licensed medical cannabis producers who require the absolute best in lighting to produce higher yeilds, healthier plants and huge trichomes if you are a medical cannabis patient or grower that loves the trichomes or makes bubblehash, sifts buds or anything of that nature, theres no LED grow light in the world currently that can produce the quality and intensity of the light our Infuzer Maxx+ line-up can obtain.

 Other living organisms, such as Cyanobacteria, purple bacteria and Heliobacteria, can exploit solar light in slightly extended spectral regions, such as the near-infrared. These bacteria live in environments such as the bottom of stagnant ponds, sediment and ocean depths. Because of their pigments, they form colorful mats of green, red and purple.

Typical PAR action spectrum, shown beside absorption spectra for chlorophyll-A, chlorophyll-B, and carotenoids

Chlorophyll, the most abundant plant pigment, is most efficient in capturing red and blue light. Accessory pigments such ascarotenes and xanthophylls harvest some green light and pass it on to the photosynthetic process, but enough of the green wavelengths are reflected to give leaves their characteristic color. An exception to the predominance of chlorophyll is autumn, when chlorophyll is degraded (because it contains N and Mg) but the accessory pigments are not (because they only containC, H and O) and remain in the leaf producing red, yellow and orange leaves.

PAR measurement is used in agriculture, forestry and oceanography. One of the important requirements for productive farmland is adequate PAR, so PAR is used to evaluate agricultural investment potential. PAR sensors stationed at various levels of the forest canopy measure the pattern of PAR availability and utilization. Photosynthetic rate and related parameters can be measured non-destructively using a photosynthesis system, and these instruments measure PAR and sometimes control PAR at set intensities. PAR measurements are also used to calculate the euphotic depth in the ocean.

The device we use to measure specific PAR value, can be a cheaper model like most growers and fish aquarium enthusiests seem to hae these days, and it is affordable and a great investment for your grow room, grow tent or grow area:

PAR-Spectrum Meter Plants Aquariums Coral Reef Medical Growers

The meter above is perfect for even the advanced gardener or grow room, grow tent or greenhouse.  This PAR meter will show you and help you decide on placement of your LED Lights as well as give you an idea on the plants who are absorbing the PAR spectrum and the ones that are missing out, telling you to move your light placement elsewhere or a better location or height that will work better for your garden and plants.   If you are interested in going deeper, and want to sell your car or dish out about $3000US or more, then you could consider a spectrometer which analyzes the light spectrum and gives you a graph showing intensity, lux, PAR values CI and more depending what you want to spend.. most of that information would not be useful to the gardener when a PAR meter does the trick for about $100US new:

Spectrometer PAR Meter Advanced For GROW LIGHTS, GARDENERS

So if you have the cash, go for it, but most of the information is useless to you and wont be of much use, so we suggest sticking to the PAR meter thats about $100US (or that range) for the best PAR meter for even the most advanced gardener, greenhouse or licensed medical cannabis producer.  We hope this helps and we hope you LIKE and SHARE this informatoin with fellow gardeners and perhaps facebook groups that may benefit from learning more about PAR and its benefits relating to plants and the best garden ever.  

If you are a demanding gardener who only settles for the best lighting possible, we highly recommend the Worlds FIRST 600 watt deep penetrating, highly intense, full sunlight, full par and UV for your garden.  There is no LED grow light in the world in its class that can outperform the Infuzer Maxx+, and its the most highly designed and modern, heavy duty commercial grade LED grow light ever built - and you can get yours right to your doorstep, its custom made right here in Canada and we ship worldwide so get yours today and see what all the talks about :)   Happy growing..

If you like this article, please Like it, and share it with other fellow growers..  they will love  you for it!