" Spectrum " and " intensity " are the two primary descriptors of light being applied to plants .
According to Fluence , a " spectrum " is the combination of wavelength that make up a light , giving the Christ Within its color and some of its biologically - relevant properties . We delineate horticultural lighting with the word " spectrum " or else of " coloration " because English word form of " colour " are imprecise : many different wavelength , or combinations of wavelengths , might be account as the same color . Our perception of unlike wavelength is n’t nuanced enough to discern 440 nm lightness from 460 nm light , for example , or the perceived difference is n’t enough recording label both of them anything other than " drear " in most context of use . Similarly , what we perceive to be " white " in colour can be several different spectra , or combination of wavelengths .
In photobiology , precision in delineate spectrum is authoritative because specific wavelengths of brightness induce specific developmental response . Examples of these responses include optimally driving photosynthetic processes , intercommunicate to the industrial plant if it is in direct sunlight or shade to induce stretch or compaction , and cause or repressing secondary metamorphosis .
Intensity is a measuring rod of how many photon are landing on an area per building block time . Our optic perceive intensity as how bright an objective or short source appear ; however , our eyes are coloured to make wavelength in the middle of the visible spectrum ( green and jaundiced ) look shining than those on the exterior ( blue and cerise ) For human coating , this is assess in lux or lumens and is not suited for photobiological software . In gardening , each wavelength in the Photosynthetically Active Radiation ( PAR ) spectrum is weight evenly and vividness is valuate as micromoles of photons per meter squared per moment . To a item , the greater the intensity of low-cal plants are exposed to , the greater the plant reply . harvest takings is typically the most significant product metric unit in commercial gardening , so growers commonly apply as gamey an intensiveness as potential of spectrums optimal for driving photosynthesis to maximize their yields .
" We assess light intensity via quantum sensor , which measures the number of photon in µmol / m2 / s as described above . Older quantum sensors are generally hunky-dory for measuring sun intensities because of the adequate statistical distribution among seeable wavelengths , however for LEDs especially using blue and ruddy on the edge of the PAR spectrum , they are less suitable because of over / under coverage of those wavelengths . Light spectrum is measured by a spectroradiometer , which measures the number of photon at each individual wavelength ( or even more precise ) . For most originate applications , a quantum detector is a suitable tool for light measurement . For research applications or trying to all right - tune spectrum / intensity level equivalence , a spectroradiometer may be a better alternative , however the monetary value comparison can be 10x,“the Fluence team says .
Spectrum and intensiveness interact in how they bear upon plant development . A spectrum that is optimum for plant development at a comparatively low intensity may not be optimum for plant developing at a high volume , and frailty versa . An example of this is in the suit of cannabis , where a spectrum relatively high in red ( 600 - 700 nm ) photon , applied at mellow intensity , is very probable to stimulate the top of the industrial plant to sprain ashen , whereas that same spectrum would not induce this whitening at scummy intensity .
Different spectra will saturate plant reception at different intensities , as well . For instance , in some crops , crimson photon are more likely to push a plant to photosynthetic chroma at a higher intensity than greenish photons .
LED technology is such that rectifying valve of unlike spectrum inherently have dissimilar efficacies of converting electrical energy into photon . A high efficacy mean that more photon are turnout for the same amount of input electricity . depend on scale of deployment and price of electricity , these differences in efficaciousness can become major differences in operational costs for the LED .
" To maximize crop production and economic bottom line , it ’s critically important to utilize a spectrum and volume specifically optimize for your product objectives , while also considering the economical implication of that light in your energy site , " the Fluence squad states . For more information : Fluencewww.fluence - led.com
