Growers generally have two options when it comes to zahradnické LED spectrums – "full spectrum" or "široké-spektrum", který appears as white light; and "červené/modré spektrum", which can appear as purple or pink light.
Červené/modré spektrum LED luminaires are often referred to as narrow band spectrum lights – because the wavelengths they emit are within a narrow band of light. LED luminaires that emit a "white" light are often referred to as "broad spectrum" or "full spectrum" světlos because they zahrnují širokou bačást světelného spektra (podobnější slunci) which renders a "white" light (čtere are no true white wavelengths).
It should be noted that essentially all "white" LEDs are blue LEDs that are coated in a phosphor that converts the blue light into longer wavelengths. The phosphor absorbs the blue light and re-emits some or most of the photons into green and red light. This coating reduces a efficiency vstupu LED converting photons into usable PAR (photosynthetically active radiation) světlo, but makes for a better work environment in sole source applications. The composition of the phosphor coating will help to determine the spectral quality of the white light emitted. To find the efficacy of your luminaire, you will need to divide the Fotosyntetický tok fotonů (PPF) of the svítidlo, podle its input wattage. The resulting efficacy hodnota, bude represented in μmol/J. The higher the number, the more efficient the luminaire is at converting electrical energy into photons of PAR.
Red/Blue LEDs
The "purple/pink" LED luminaires that many associate with horticultural lighTing, použití varying combinations of red and blue VEDENÝs, and are recommended pro greenhouse growers who are already receiving the full spectrum of light from the sun. Since photosynthesis peaks in the red and blue wavelengths it makes this spectrum, not only the most efficient for plant growth, but also the most energy efficient. From this perspective, if you are already getting full spectrum sunlight from outdoors, it would make the most sense to put most of your energy into wavelengths that are most optimal for photosynthesis, and where you will see the biggest energy cost savings. This combination is more energy efficient than "white" or full spectrum LEDs because blue and červené LED mají nejvyšší fotonovou účinnost ve srovnání s jinými barvami i.e. they convert the highest amount of electricity in photons, so you are getting more growth from your plants per dollar spent.
So, why do we need a combination of red and blue to grow plants, why can't we use just blue or just red LEDs? While red is most efficient for photosynthesis, having only red light would result in poor growth such as very elongated stems, so blue is added to keep plants compact and a more typical shape. On the other hand, you can't grow plants under only blue light either, as their growth and development will be adversely affected. Researchers have found over the years, that having a combination high red light to a lower percentage of blue light has been shown to be optimální for the production z skleníkové plodiny that are already receiving light from the sun. Since there není "ideal spectrum" for greenhouse plodiny, most LED manufacturers offer a fixed ratio of red to blue that has been považováno the most optimum for horticultural crop growth and production.
Pokud pěstujete skleník a chcete nainstalovat LED diody, doporučujeme our HortiLED Top 2.0 Červené Bílý (Střední Modrý) spectrum. This LED spectrum has a softer pink barva, making it easier to work under and grade rostliny, than purple light, and has a high efficacy rating of 3.3 μmol/J―snížení spotřeby energie až o 40 procent oproti tradičním systémům HPS. Pěstitelé zjistili, že přináší skvělé výsledkylts―either as a standalone LED installation or in a hybrid application (HPS-LED combination)―across all stages of growth for mnoho plodin včetně vinné révy, okrasnés; listnatý greens and cannabis.
Plný-Spectrum "White" LEDs
While in a greenhouse, the outdoor sunlight will balance out the "pink or purple" light emitted from LEDs, the same spectrum in a sole-source, krytý application dodává omezenou spektrum světla na plodinu a může být unpleasant to work under. Therefore, many indoor growers have shifted away from úzké spektrum LEDs, to "white" široký spectrum LEDs.
Broad spectrum LEDs have a lower efficacy than red/blue LEDs due to conversion, energy, and optical losses within the phosphor conversion process. However, since in krytý applications where the luminaires are the jediný source of light, bsilniční spectrum LED luminaires are far better než červená/modrá od té doby they emit a wide range of wavelengths for your crop throughout the different growth stages. This is important because as we do more research, we are discovering that wavelengths such as green, which were previously thought of as not very useful, are proving to be important in photosynthesis and certain morphological responses. Additionally, many full broad spektrum luminaires can also emit energy in the far-red region, which can help promote stem extension and leaf expansion.
Vn environment with only red/blue light, workers will not be able to properly identify problems such as nutritional deficiency, nemocí and pests. So broad spectrum light is not only more pleasing to the eye, but also makes it easier to work and assess plant health.
Takže i když můžete použít červenou/modrou LED v aplikacích s jediným zdrojem, pro lidské zdraví a plant scouting being affected, we highly recommend using a Široké spektrum LED. For growers in sole source applications, we offer a "daylight" spectrum option with the HortiLED Nejlepší 2.0―ideal for growth of indoor crops such as cannabis and leafy greens.
