Growers generally have two options when it comes to садовий світлодіод spectrums – "full spectrum" or "широкий{0}}спектр", котрий appears as white light; and "червоний/синій спектр", which can appear as purple or pink light.
Світлодіод червоного/синього спектру 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" світлоs because they включають широку баnd спектру світла (більш схожий на сонце) 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 в efficiency світлодіода в converting photons into usable PAR (photosynthetically active radiation) світло, 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 Фотосинтетичний фотонний потік (PPF) of the світильник, за its input wattage. The resulting efficacy значення, буде 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, використання varying combinations of red and blue СВІТЛОДІОДНИЙs, and are recommended для 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 червоні світлодіоди мають найвищу фотонну ефективність порівняно з іншими кольорами 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 оптимальний for the production з тепличних культур that are already receiving light from the sun. Since there ні "ideal spectrum" for greenhouse сільськогосподарських культур, most LED manufacturers offer a fixed ratio of red to blue that has been вважається the most optimum for horticultural crop growth and production.
Якщо ви любитель теплиць і хочете встановити світлодіоди, ми рекомендуємо our HortiLED Top 2.0 червоний Білий (Середній Синій) spectrum. This LED spectrum has a softer pink колір, making it easier to work under and grade рослини, than purple light, and has a high efficacy rating of 3.3 μmol/J―зниження споживання енергії на 40 відсотків порівняно з традиційними системами ГЕС. Виробники вважають, що це дає чудові результатиlts―either as a standalone LED installation or in a hybrid application (HPS-LED combination)―across all stages of growth for багато культур, включаючи виноградні культури, декоративніs; листяний greens and cannabis.
Повний-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, закритий application надає обмежений spектрум світла до врожаю і може бути unpleasant to work under. Therefore, many indoor growers have shifted away from вузький спектр LEDs, to "white" широкий 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 закритий applications where the luminaires are the підошва source of light, bдорожні спецtром LED luminaires are far better ніж червоний/синій відтоді 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 спектр 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, захворювання 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.
Таким чином, хоча ви можете використовувати червоний/синій світлодіод у програмах з єдиним джерелом, для здоров’я людини та plant scouting being affected, we highly recommend using a Широкий спектр 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.
