How to choose suitable LED chips for LED grow light
How to choose suitable LED chips for LED grow light

Nowadays, horticulture lighting become more and more popular throughout the world. Especially the LED grow light is first choice for cultivator with lower energy cost and long life span advantages.

How can we choose the suitable LED components for a high quality LED grow light? It becomes very important for a LED horticulture lighting company.

Horticulture LED packages produce electromagnetic radiation that targets the active spectrum of photo-morphogenesis, photosynthesis, and phototropism in plants.

In horticultural lighting, efficiency has another version of interpretation. Traditionally, horticulture lighting systems had made use of high pressure sodium (HPS), metal halide (MH) lamps, or in some cases fluorescent lamps. However, these light sources has a very low energy conversion efficiency (typically less than 20%). In contrast, LED chips have a wall plug efficiency of up to 66% and the phosphor-converted LEDs have a radiant efficiency well over 40%.

How do we choose the wavelength and spectrum for horticulture LEDs?

Horticulture LEDs are available in two primary groups: full spectrum LEDs and narrow band LEDs. Full (or broad) spectrum LEDs deliver the spectral composition of sunlight yet without thermal radiation and wavelength waste. These LEDs are formulated with emphasis on the blue and red regions while providing additional wavelengths such as far red and green to support full cycle cultivation and complete plant development. Narrow band LEDs provide monochromatic output to maximize the most needed wavelengths of light. These LEDs are available in deep blue (450 nm), hyper red (660 nm), far red (730 nm), and green (530 nm) colors. Purple LEDs, which is neither a full spectrum LED nor a narrow band LED but combines key wavelengths of red and blue into a single package, are also a standard offering in the market. Purple LEDs can also be mixed with the broad spectrum lime LEDs to increase yield (fresh weight) and antioxidant levels while producing high quality white light to aid in visual inspection and plant harvesting.

In addtion, other Factors of choosing LED chips as below:

  1. The application of LED grow lights.For flowers, for leaf plants, for fruit plants, for tissue culture, for seeding, for flowers, for fruit, etc. we should choose different wavelength and spectrum LEDs. If we choose the LEDs for root and leaf plants, we’d better choose more blue spectrum LEDs (435nm, 450nm). For flower and fruit plants, we should choose more deep red 660nm and infrared 730nm LEDs. Secondly,for different types of lighting fixture. For example, normally use high power 3030,3535,5050 1-5W LEDs for horticulture top lighting in green house. Choose middle power 2835 or 3030 0.2W to 1W for LED tube lights and panel lights .
  2. Power of the LED grow lights. Depends on the environment of cultivation, like plant factory, vertical farm, normally using middle power LEDs such as 2835, 3030, 3535 middle power 0.2-1W SMD LEDs. For the horticulture top light and inter-light, normally using high power LEDs such as 3535, 5050, and 6868 2-5W high power LED chips.
  3. The target of performance of led grow light. PPF, PPE , and PPFD of the led grow lighting fixture are the key performance for plant photosynthesis. Cultivator or lighting companies should have the target of these parameters. For example target PPF of 800W lighting fixture is 1930 μmol/J, we’ll calculate out target PPE as 2.41μmol/J, then we choose the LEDs which PPE must be higher than 2.5μmol/J.
  4. The budget of LED components for the horticultural lighting. There ar e so many types of LED specification with quite different cost. Nowadays, horticulture lighting are still expensive, because the costs of LEDs and drivers for led grow lighting are high. However, we can choose the suitable LEDs to reduce the cost. Firstly we should choose the suitable specification, for example, for 0.5W mid-power LEDs, normally we choose 2835 LEDs cost less than 3030 and 3535. In addition, we should choose the right quantity based on the cultivation requirement.

Choosing a suitable LEDs is still a complicate and costly work for most cultivator and lighting companies. However LEDESTAR can help us to choose the best LEDs and solutions efficiently with lower cost.

Ledestar, be honored as a LED magician of horticulture lighting, is a professional manufacturer specialized in horticultural LED diodes SMD LED 3030,3535, 2835, 5050, 5630, COB LEDs.

Established in 2008, Ledestar has been developed and completed a monthly production of more than one billion strictly quality controlled SMD LEDs, Built over 12000 square meters of workshop (including 8000 square meters of modern dust-free workshop) that are equipped with 116ea production lines, 310ea advanced automation equipment and more than 200 highly-skilled staffs. Ledestar has the quality certification by IS09001 ISO14001 and the products have been certificated by RoHS, REACH, LM-80, EN62471, etc.

LEDESTAR has been and continue concentrating on horticultural LEDs, designing and creating higher efficient LEDs and suitable LED schemes for cultivation. Increase the yield, save the energy,cut the cost. To take horticultural lighting to a next level.


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