Growers generally have two options when it comes to градинарски LED spectrums – "full spectrum" or "широк{0}}спектър", който appears as white light; and "червен/син спектър", which can appear as purple or pink light.
Светодиодът с червен/син спектър 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" светлинаs because they включва широка band от светлинния спектър (по-подобен на слънцето) which renders a "white" light (тиere 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 на efficiency на светодиода в converting photons into usable PAR (photosynthetically active radiation) светлина, 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 Фотосинтетичен фотонен поток (PPF) of the осветително тяло, от its input wattage. The resulting efficacy стойност, ще бъде 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 lighтинг, използване varying combinations of red and blue LEDs, and are recommended за 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 червените светодиоди имат най-висока фотонна ефективност в сравнение с други цветове 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 оптимален for the production на оранжерийни култури that are already receiving light from the sun. Since there не е "ideal spectrum" for greenhouse култури, most LED manufacturers offer a fixed ratio of red to blue that has been се смята the most optimum for horticultural crop growth and production.
Ако сте производител на оранжерии, който иска да инсталира светодиоди, препоръчваме our HortiLED Top 2.0 червен Бяла (Среден Син) spectrum. This LED spectrum has a softer pink цвят, making it easier to work under and grade растения, than purple light, and has a high efficacy rating of 3.3 μmol/J―намаляване на консумацията на енергия с до 40 процента в сравнение с традиционните HPS системи. Производителите откриват, че предоставя страхотно резюменегов―either as a standalone LED installation or in a hybrid application (HPS-LED combination)―across all stages of growth for много култури, включително лозови култури, декоративнис; листни greens and cannabis.
Пълен-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, на закрито application доставя ограничен spектрумът на светлината към културата и може да бъде unpleasant to work under. Therefore, many indoor growers have shifted away from тесен спектър LEDs, to "white" широк 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 на закрито applications where the luminaires are the подметка source of light, bпътни спецификацииtром LED luminaires are far better отколкото червено/синьо оттогава 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 спектър luminaires can also emit energy in the far-red region, which can help promote stem extension and leaf expansion.
Вn environment with only red/blue light, workers will not be able to properly identify problems such as nutritional deficiency, заболявания 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.
Така че, докато можете да използвате червен/син светодиод в приложения с единствен източник, с човешкото здраве и plant scouting being affected, we highly recommend using a широк спектър LED. For growers in sole source applications, we offer a "daylight" spectrum option with the HortiLED Топ 2.0―ideal for growth of indoor crops such as cannabis and leafy greens.
