Growers generally have two options when it comes to trädgårds-LED spectrums – "full spectrum" or "brett-spektrum", som appears as white light; and "rött/blått spektrum", which can appear as purple or pink light.
Den röda/blåa lysdioden med spektrum 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" ljuss because they innefatta ett brett baandra delen av ljusspektrumet (liknar mer solen) which renders a "white" light (there 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 de efficiency av lysdioden in converting photons into usable PAR (photosynthetically active radiation) ljus, 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 Fotosyntetisk fotonflöde (PPF) of the armatur, förbi its input wattage. The resulting efficacy värde, kommer att vara 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, använda sig av varying combinations of red and blue LEDs, and are recommended för 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 röda lysdioder har den högsta fotoneffektiviteten jämfört med andra färger 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 optimalt for the production av växthusgrödor that are already receiving light from the sun. Since there är nej "ideal spectrum" for greenhouse gröda, most LED manufacturers offer a fixed ratio of red to blue that has been anses the most optimum for horticultural crop growth and production.
Om du är en växthusodlare som vill installera lysdioder rekommenderar vi our HortiLED Top 2.0 Röd Vit (Medium Blå) spectrum. This LED spectrum has a softer pink Färg, making it easier to work under and grade växter, than purple light, and has a high efficacy rating of 3.3 μmol/J―minska energiförbrukningen med så mycket som 40 procent jämfört med traditionella HPS-system. Odlare tycker att det ger bra resultatDess―either as a standalone LED installation or in a hybrid application (HPS-LED combination)―across all stages of growth for många grödor inklusive vinodlingar, prydnadsväxters; lummig greens and cannabis.
Full-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, inomhus- application levererar en begränsad spectrum av ljus till grödan och kan vara unpleasant to work under. Therefore, many indoor growers have shifted away from smalt spektrum LEDs, to "white" bred 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 inomhus- applications where the luminaires are the enda source of light, bväg spectrom LED luminaires are far better än röd/blå sedan dess 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.
I enn environment with only red/blue light, workers will not be able to properly identify problems such as nutritional deficiency, sjukdomar 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.
Så, medan du kan använda en röd/blå LED i applikationer med enstaka källor, med människors hälsa och plant scouting being affected, we highly recommend using a brett spektrum LED. For growers in sole source applications, we offer a "daylight" spectrum option with the HortiLED Topp 2.0―ideal for growth of indoor crops such as cannabis and leafy greens.
