Left Fixing Agricultural Led Light Systems
Light-emitting diode (LED) technology is a promising lighting source for artificial agricultural systems. Its spectral composition can affect key physiological responses such as morphogenesis, photosynthetic performance, nutrient metabolism and flower initiation.
The physical properties of LEDs, such as low radiant heat and dimmability, can help to increase energy-use efficiency without compromising crop health. Moreover, reducing the vertical separation distance between photon-emitting surfaces and the light-absorbing crop surface can enhance CCPCE by capturing more obliquely emitted photons.
Spectral Range
With more investment being made in controlled environment agriculture, growers are keen to know what the optimal spectral range of LEDs is for a particular crop. This knowledge is necessary for optimal plant growth and quality, nutrient efficiency, pest control and the production of bioactive compounds. In addition, it is also important to understand how different spectral combinations affect photosynthetic performance.
Several studies have shown that the photosynthesis of plants is sensitive to light spectral quality. For example, a combination of red and blue LEDs can increase the photosynthesis of lettuce leaves. Similarly, a combination of far-red and blue LEDs can enhance hypocotyl elongation in squash (Cucurbita pepo) seedlings and flowering initiation in ageratum (Ageratum houstonianum), marigold (Tagetes erecta) and salvia (Salvia officinalis) [36]. The effects of light on the photosynthesis of other crops are less clear, but researchers have observed that spectral quality influences the activity of phytochromes, cryptochromes and phototropins.
In addition, the synthesis of three main photosynthetic pigments is dependent on light quality: chlorophylls, carotenes and anthocyanins. The synthesis of the former two pigments is dependent on light-dependent reduction of protoploid preprotochlorophyllide, while anthocyanins require light-dependent stimulation of chalcone synthase gene expression. In this context, the spectral range Left fixing Agricultural Led Light of LEDs should include wavelengths that are absorbed by these genes to maximize their function. Light intensity is also important in determining the extent to which plants respond to different light spectra.
Power Consumption
While considerable improvement has been made to electrical efficiency and photon efficacy of LEDs as sole source lighting in vertical farms, the physical capabilities of these light-emitting diodes can be further leveraged to enhance crop canopy photon capture efficiency (CCPCE). CCPCE measures the fraction of obliquely emitted light that is incident upon foliar crop surfaces.
Current standard separation distances between the underside of LED lighting units and the top of crops in a typical vertical farm setup prevent the uniformity in photon intensity required for the unrestricted horizontal movement of fresh air across benches needed for thermal and humidity control, as well as CO2 refreshment to quickly photosynthesize crop biomass. Using the currently-driven LED property of low radiant heat and dimmability, it is possible to reduce this separation distance and still achieve the same photon intensity at the crop surface. This close-canopy lighting (CCL) strategy should enable higher fresh and dry shoot biomass yields for the same electrical energy consumed.
This proof-of-concept study investigated the effects of varying separation distances between LED-emitting surfaces and foliar crop surfaces on EUE and yield (ratio of g fresh/dry shoot biomass to kWh of electricity consumed). To minimize instantaneous power draw, LED lighting was dimmed at 45, 35, and 25 cm separation distances to achieve identical PPFD at the crop surface. The results showed that a 15-cm separation distance produced significantly greater EUE and yield compared to the 45-cm separation distance.
Maintenance
There are a few things to keep in mind when maintaining LED light systems. First, make sure your power supply and light strips are compatible with each other. If you have a dimmer connected to your lights, check that it is working properly. If the dimmer isn’t functioning correctly, it will cause a problem with your power supply and LED strip. In some cases, the solution may be as simple as adjusting the wiring.
Other maintenance tips include routine inspections, cleaning the growing room and lowering room temperature. Keeping your grow space clean and tidy will help ensure that the lights stay in good condition.
Warranty
THIS LIMITED WARRANTY IS ONLY GIVEN TO THE ORIGINAL RETAIL PURCHASER AND IS NOT Left fixing Agricultural Led Light supplier TRANSFERABLE. SCHUMACHER ELECTRIC CORPORATION (the “Manufacturer”) GUARANTEE THAT THIS PRODUCT WILL BE FREE FROM DEFECTS IN MATERIAL AND WORKMANSHIP FOR A PERIOD OF ONE (1) YEAR FROM DATE OF ORIGINAL RETAIL PURCHASE. THE MANUFACTURER’S OBLIGATION UNDER THIS WARRANTY IS SOLELY TO REPAIR OR REPLACE THE PRODUCT OR PARTS, AT THE OPTION OF THE MANUFACTURER. THIS LIMITED WARRANTY VOID IF THE PRODUCT IS DAMAGED BY ACCIDENT, ALTERATION, MISUSE OR ABUSE, OR IF ANY SERIAL NUMBER OR OTHER IDENTIFYING MARK OR MARKINGS APPEARING ON THIS PRODUCT HAVE BEEN REMOVED, OBLIGATION OR OBLIGATED IN ANY WAY. THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY HAVE OTHER RIGHTS WHICH VARY FROM STATE TO STATE.
