SGL-Horticulture Lighting

Light uniformity of grow lights: Why high PPFD average values may mask the light spot problem In the field of grow lighting, PPFD (photosynthetic photon flux density) is a key indicator for measuring the performance of grow lights. However, a high PPFD average value may mask the “light spot” problem in the irradiated area, that is, some areas have too much light, while other areas have insufficient light. Some growers tend to only focus on the average value of PPFD when choosing grow lights, and ignore its uniformity. The light spot effect refers to the phenomenon that grow lights?produce a concentrated area of high PPFD within the irradiation range, while the surrounding areas have lower PPFD. This distribution will lead to: 1. Affect plant growth and yield Plants in high PPFD areas may experience photoinhibition due to excessive light, and their photosynthetic efficiency will decrease instead. Studies have shown that when PPFD exceeds 1000 μmol/m2·s, the photosynthetic rate of many greenhouse crops no longer increases, but may damage chlorophyll due to photooxidation. Plants with lower PPFD in the edge area may have a decreased photosynthetic rate due to insufficient light, affecting growth and yield. 2. Waste energy and reduce planting efficiency Due to uneven light distribution, growers often install additional supplementary lights to increase energy consumption. For example, in a greenhouse with a PPFD uniformity of less than 50%, the energy consumption of the same planting area is about 22% higher than that of a greenhouse with a uniformity of more than 80%. How to measure and optimize light uniformity? 1. Pay attention to the uniformity index (UI) PPFD uniformity is usually expressed as UI = minimum PPFD / maximum PPFD. For example: Uneven light (UI = 0.3): 1200 μmol/m2·s in the center and only 360 μmol/m2·s at the edge Uniform light (UI = 0.7): 900 μmol/m2·s in the center and 630 μmol/m2·s at the edge Studies have shown that when UI > 0.6, the photosynthetic efficiency and yield of most crops can be better guaranteed. 2. Choose a reasonable lamp design Compared with narrow-angle spotlight LEDs, wide-angle lenses above 120° can reduce light spots and improve light uniformity. At the same time, the layout of multi-light source LED arrays can significantly improve the uniformity of light distribution. 3. Reasonable installation and light environment optimization Increase the distance between lamps and plants to reduce the problem of excessive local light intensity. Greenhouse walls or floors with high reflectivity (>85%) can reduce light energy loss and improve light utilization in edge areas. Click here for more information:https://lnkd.in/dTdUZMGW #LEDGrowLight #GrowLightUniformity #FruitandVegetablePlanting #PPFDAverage #GrowLightLightingSolution #GreenhousePlanting

Can LED grow lights?still maintain efficient output in low temperature environments? With the rapid development of facility agriculture, LED plant growth lights have become the mainstream choice in the field of plant growth lighting with their advantages such as high efficiency, energy saving and customizable spectrum. However, the impact of ambient temperature on the performance of LED lamps and plant growth cannot be ignored, especially in low temperature environments. Whether LED grow lights?can maintain efficient output has become the focus of industry attention. The impact of low temperature on plant growth The growth and development of plants are highly sensitive to temperature. Low temperature environments will inhibit plant growth, reduce photosynthetic rates, and affect the normal development of plants. Application of LED light sources in low temperature environments In low temperature environments, traditional light sources may not provide sufficient light intensity due to insufficient heat, affecting plant growth. In contrast, LED light sources are energy-saving and efficient, and can provide stable light in low temperature environments. Practical application cases An experiment conducted in a low temperature environment of 8℃ to 12℃ proved that the internode length of cucumber plants increased by about 18%, the number of female flowers increased by 22%, the fruit setting rate increased by 15%, and the fruit length and weight increased by about 12% and 14% respectively by using LED grow lights?with a ratio of red light (660nm) to blue light (450nm) in a ratio of 4:1 and supplementing light for 12 hours a day. This case shows that LED grow lights?can maintain efficient light output in low temperature environments, promote crop growth and fruit quality, and are suitable for facility agricultural production in winter or high-cold areas. The impact of low temperature on plant growth is highly valued by growers. By reasonably customizing the spectrum of LED lamps and adjusting the LED light intensity, normal growth and efficient production of plants can be achieved under low temperature conditions. SGL GHT03 LED grow light has a 150° beam angle, can provide more uniform light distribution, and has a light output of up to 4560μmol/s and a PPE of up to 3.8μmol/J. It can provide stable light output even in low temperature environments, effectively promoting crop photosynthesis and growth and development, and is suitable for agricultural planting in various greenhouses and cold regions. Click here for more information: https://lnkd.in/d3X4GJDk #Lowtemperatureplanting #LEDgrowthlight #Fruitandvegetableplanting #Plantlightingsolution #Greenhouseplanting #LEDgrowthlight

Do low-light crops really not need strong light? Misunderstandings and truths about the light compensation point During plant growth, the effect of light intensity on photosynthesis is crucial. However, there are some misunderstandings about whether low-light crops do not need strong light. This article will explore the concept of light compensation point and, combined with relevant research data, reveal the real demand for light intensity for low-light crops. Light compensation point and light saturation point The light compensation point (LCP) refers to the point at which the amount of oxygen produced by photosynthesis is equal to the amount of oxygen consumed by respiration under a specific light intensity, and the net photosynthetic rate is zero. When the light intensity is higher than the light compensation point, plants begin to accumulate organic matter and promote growth. The light saturation point (LSP) refers to the point at which the photosynthesis rate no longer increases with the increase of light intensity, indicating the upper limit of plant light utilization. Adaptation mechanism of low-light crops Studies have shown that low light stress can change the morphological structure of plant roots, stems and leaves, regulate the content of photosynthetic pigments and the activity of photosynthetic enzymes, and affect plant growth and development and dry matter accumulation efficiency. After shading, plants usually adapt to the weak light environment by reducing the root-crown ratio, increasing the specific leaf area, increasing the chlorophyll content (especially the content of chlorophyll b), reducing the light saturation point and light compensation point, reducing the dark respiration rate, and increasing the apparent quantum efficiency. Taking chrysanthemum as an example, under weak light conditions, as the weak light exposure time increases and the degree deepens, the apparent quantum efficiency (AQE) of chrysanthemum leaves gradually decreases, the light compensation point (LCP) increases, and the light saturation point (LSP) decreases, thereby reducing the maximum net photosynthetic rate (Pmax) and hindering growth. Therefore, in agricultural planting, the light intensity should be reasonably adjusted according to the light compensation point and light saturation point of different crops to meet their growth needs. #PlantPhotosynthesis #PlantLightingSolutions #LEDGrowLight #GreenhousePlanting #FlowerPlanting #LEDGrowLight

Advantages of LED and HPS hybrid planting In modern agriculture, the choice of lighting technology has a crucial impact on crop growth and yield. High-pressure sodium lamps (HPS) and light-emitting diodes (LEDs) are the two main types of plant growth lamps. In recent years, many growers have adopted a hybrid lighting method of LED and HPS in order to combine the advantages of both and optimize the crop growth environment. This article will explore the advantages of LED and HPS hybrid planting in detail. 1. Improve light energy utilization efficiency The light efficiency of HPS lamps is about 100-150 lumens/watt, but its spectrum is mainly concentrated in the yellow and red light areas, lacking blue light and ultraviolet light. The light efficiency of LED lamps can reach 200-300 lumens/watt, and the spectrum can be customized, which can supplement the insufficient spectrum of HPS lamps. Studies have shown that the light energy utilization efficiency can be increased by 20%-30% by mixing LED and HPS lamps. 2. Heat management HPS lamps generate a lot of heat when working, which may cause excessive temperatures in the greenhouse, increase cooling costs, and even cause heat damage to plants. In contrast, LED lamps generate less heat and do not cause thermal damage to plants. Therefore, in a hybrid lighting system, the low heat output of LEDs helps to reduce the overall temperature of the greenhouse, reduce dependence on the cooling system, and reduce energy consumption. 3. Economic benefits Although the initial investment cost of LED lamps is higher, their long life and high energy efficiency give them economic advantages in long-term operation. The service life of LED lamps is generally 50,000 to 100,000 hours, which is much higher than the 10,000 to 20,000 hours of HPS lamps. This means that although the initial investment is large, the maintenance and replacement costs of LED lamps are lower in long-term operation. By combining LED with HPS, growers can enjoy the long-term economic benefits of LED while controlling the initial investment. 4. Improve the quality of planting yield and be environmentally friendly The hybrid lighting method can significantly increase the yield and quality of crops, improve the appearance and taste of crops, and enhance market competitiveness. In addition, hybrid lighting can reduce light pollution and heat radiation, and reduce the impact on the environment. With the continuous advancement of LED technology and the reduction of costs, the application prospects of hybrid lighting systems are broad. This innovative lighting solution is reshaping the production model of modern agriculture and providing new solutions for food security and sustainable agricultural development. #LEDGrowLight ?#FruitandVegetablePlanting ?#LEDFillinLight #PlantLightingSolution #CustomizedSpectrum #GreenhousePlanting #LEDGrowLight

In a glass greenhouse in a high-latitude area, how to determine the PPFD value of LED supplementary lighting? How does LED cooperate with sunlight? In high-latitude areas, insufficient light in winter seriously restricts the growth of greenhouse crops. LED supplementary lighting technology is an effective means to solve this problem, and determining the appropriate PPFD (photosynthetic photon flux density) value and the way LED cooperates with sunlight is the key. 1. Determine the PPFD value of LED supplementary lighting PPFD is a key indicator to measure the intensity of photosynthetically active radiation received by plants, and the unit is μmol/m2/s. The following factors need to be considered to determine the PPFD value: Crop type: Different crops have significant differences in light requirements. For example, the light saturation point of tomatoes is about 800-1000 μmol/m2/s, while lettuce is only 200-400 μmol/m2/s. Growth stage: The seedling stage, vegetative growth stage and reproductive growth stage have different light requirements. Generally, the reproductive growth stage requires a higher PPFD value. Natural lighting conditions: In high-latitude areas, the light intensity is low in winter, the sunshine time is short, and higher supplementary light intensity is required. Greenhouse covering materials: Glass has a high light transmittance, while double-layer plastic film has a low light transmittance, and the PPFD value needs to be adjusted according to actual conditions. 2. The coordination of LED and sunlight Supplementary light time: Determine the supplementary light time period according to the sunrise and sunset time and crop needs. Usually, supplementary light is provided for 2-4 hours before sunrise and after sunset to extend the light time. Spectrum customization: Customize the spectrum of LED lights according to the needs of different crops planted, such as: supplementary red light to promote flowering and fruiting, supplementary blue light to promote plant health. Light intensity adjustment: Adjust the LED supplementary light intensity in real time according to weather conditions and crop needs. For example, increase the supplementary light intensity on cloudy days and reduce the supplementary light intensity on sunny days. In glass greenhouses in high-latitude areas, reasonably determining the PPFD value of LED lighting and achieving effective coordination between LED and sunlight are the keys to improving crop yield and quality. In the future, with the continuous development of LED technology and the reduction of costs, LED lighting technology will play an increasingly important role in agricultural planting in high-latitude areas. Click here for more information: https://lnkd.in/d3X4GJDk #Highlatitudeplanting #LEDplantgrowthlight #Glassgreenhouseplanting #Fruitandvegetableplanting #LEDsupplementarylighting #Winterplanting #PPFD

How to judge whether the grow lighting scheme is professional? How to read and understand it? grow lighting is an important tool for the development of modern agriculture, and professional grow lighting schemes are the key to ensuring the healthy growth of plants and improving yield and quality. So, how to judge whether a grow lighting scheme is professional? How to read and understand it? The following will analyze from four aspects. 1. Accurate spectrum to meet plant needs A professional grow lighting scheme should accurately customize the spectrum ratio according to the growth stage and needs of different plants. For example: Blue light (400-500nm): promotes plant leaf growth and photosynthesis. Red light (600-700nm): promotes plant flowering and fruiting. 2. Appropriate light intensity promotes photosynthesis: Light intensity (PPFD) refers to the light energy per unit area irradiated to the plant, in μmol/m2·s. Professional lighting solutions will adjust the PPFD value according to the needs of the plants. Plants have different light needs at different growth stages: Seedling stage: about 80-150 μmol/m2·s. Growing period: about 200-400 μmol/m2·s. Flowering and fruiting period: can reach more than 500 μmol/m2·s. Ensuring that the PPFD per square meter reaches the illumination level required by the plant is a basic requirement of professional solutions. 3. Good light uniformity, energy saving and high efficiency Professional plant light lighting solutions will ensure uniform light distribution through reasonable lamp layout and optical design to avoid areas with insufficient or excessive light. When designing a lighting solution, it is necessary to simulate the light distribution map to ensure that the plants in each area can get enough light. Usually, the light uniformity coefficient (CU) is required to be greater than 0.7; professional lighting solutions will also use high-efficiency LED grow lights, combined with intelligent control systems, to achieve on-demand lighting and reduce energy consumption. 4. Detailed data and strong feasibility Professional solutions will provide detailed spectrum diagrams, light intensity distribution diagrams, lamp layout diagrams and other data, and clearly mark the lamp model, quantity, installation height and other information to ensure the feasibility of the solution. Based on the above points, choosing the right LED grow light is the basis for realizing a professional lighting solution. SGL can accurately customize the spectrum of LED grow lights and provide the most suitable lighting solution according to the growth needs of different plants to help improve plant health and yield. Choose SGL LED grow lights to help you achieve higher quality crop production. Click here for more information: https://lnkd.in/dWMKYbv4 #plantlightingsolutions #fruitandvegetableplanting #LEDplantlight #customspectrum #greenhouseplanting #LEDgrowlight #shelfplanting

What are the heat dissipation methods of LED grow lights? What are the advantages of SGL's passive heat dissipation? According to the research of the US Department of Energy (DOE), the life of LED chips will be reduced by 50% for every 10℃ increase in temperature. As an important tool in modern agriculture, the heat dissipation performance of LED grow lights directly affects the life of the lamps and the growth efficiency of plants. Therefore, this article will explore the heat dissipation methods of LED grow lights in depth and introduce the advantages of SGL's passive heat dissipation technology in detail. 1. Common heat dissipation methods of LED grow lights Active heat dissipation The air flow is driven by external forces such as fans to take away the heat. The advantages are high heat dissipation efficiency, and the disadvantages are high noise, high energy consumption, and limited life. Liquid cooling Liquid cooling is a way to take away heat by circulating liquid, which is common in high-power LED lamps. The disadvantages are high cost and complex maintenance. Passive heat dissipation Dissipate heat by natural convection and thermal radiation without additional power. Natural convection is in direct contact with air through the radiator (such as radiator, lamp housing, circuit board). The air around the heat exchanger becomes hot air due to the absorption of heat, and then the hot air rises and the cold air falls, so that the air convects and achieves the effect of heat dissipation. 2. SGL's passive heat dissipation advantage Efficient heat dissipation performance SGL has a patented integrated heat dissipation design, which uses high-quality aluminum and high thermal conductivity materials, and cooperates with a precisely designed heat sink structure to enable heat to be quickly conducted and diffused to the entire heat dissipation surface, thereby achieving efficient heat dissipation. According to R&D data, when SGL's LED grow lights are working, the surface temperature of the lamps is usually maintained at around 40°C, while the temperature of some LED lamps with low heat dissipation efficiency may reach above 50°C. Such a temperature difference is crucial to extending the life of LED lamps. Low maintenance cost Since there are no fans and other components, and SGL's passive cooling system has a long service life, there is almost no need for additional maintenance. Energy saving and environmental protection SGL's passive cooling design uses natural convection and radiation to dissipate heat, avoiding the energy consumption of fans and other mechanical devices. No noise SGL's passive cooling relies entirely on natural convection, avoiding the noise that may be generated during operation. Click here for more information: https://lnkd.in/dTdUZMGW #GrowLightPassiveCooling #LEDGrowLight #GreenhousePlanting #SGLLightingSolution #LEDFillLight #FruitandVegetablePlanting #FlowerPlanting #SGLCoolingTechnology

Application and mechanism of far-red light of 800nm and longer wavelength in LED grow lights Far-red light (wavelength 700-800nm) is an important part of the solar spectrum and plays an important role in plant growth. With the advancement of LED technology, the application value of far-red light in facility agriculture has become increasingly prominent. This article will explore in depth the application and mechanism of far-red light of 800nm and longer wavelength in LED grow lights. Effect of far-red light on plant growth Far-red light has an important influence on plant photosynthesis, photomorphogenesis and hormone balance in plants. Studies have shown that far-red light irradiation can effectively affect the photomorphogenesis response of plants . This response is the ability of plants to adjust their growth patterns to adapt to the environment under changing environmental light conditions. According to research, far-red light with a wavelength of 800nm has a significant growth-promoting effect in different plant varieties. For example, in tomato cultivation, the use of far-red light increases the growth height of plants by about 15%. At the same time, far-red light can promote leaf extension, increase the leaf area of the plant, and thus improve the photosynthesis efficiency of the plant. Application of far-red light in plant spectrum regulation In the design and application of LED grow lights, far-red light is usually used in combination with red light and blue light to optimize the spectral ratio. Studies have shown that when the ratio of far-red light to red light is 0.7-1.2, the photosynthesis efficiency of the plant is the highest. In tomato cultivation, the spectral ratio of red light: blue light: far-red light = 6:2:2 is used to increase the yield by 12%-15%. In addition, in a high temperature and low light intensity environment, an appropriate increase in far-red light can adjust the opening and closing of plant stomata and improve the efficiency of water and nutrient utilization. The mechanism of action of far-red light of 800nm and longer wavelengths The mechanism of action of far-red light is mainly related to the conversion of phytochrome. Phytochrome exists in two reversible forms: Pr (red light absorbing type) and Pfr (far-red light absorbing type). Red light of around 660nm converts Pr into Pfr, while far-red light of 730nm converts Pfr back into Pr. This conversion process regulates the photomorphogenesis of plants. Far-red light of 800nm wavelength can accurately regulate the growth direction and morphology of plants by affecting the conversion balance of phytochrome. With the in-depth study of the mechanism of action of far-red light, its application in LED grow lights will be more accurate and efficient. #farredlight #spectrum #LEDgrowlight #photomorphogenesisreaction #farredlightapplication

Why do different spectra affect poultry in chicken farms? Light is an important environmental factor that affects the growth, development, behavioral activities and production performance of poultry. In recent years, with the popularization of LED lighting technology, chicken farms can choose lighting solutions with specific spectra according to different poultry farming needs to optimize production efficiency. This article will combine relevant research data to explore the effects of different spectra on poultry. 1. The effect of spectrum on poultry physiology The visual system of poultry is very sensitive to the spectrum, especially blue light and red light. Studies have shown that blue light (450-495 nanometers) can promote the growth of poultry, especially broilers. A study found that under blue light, the growth rate of poultry increased by 12%-15% compared with ordinary white light. Blue light promotes the development of bones and muscles of poultry by stimulating the secretion of growth hormone. Red light (620-750 nanometers) has a significant effect on the reproduction of poultry. The right amount of red light can stimulate the secretion of melatonin, thereby regulating the biological clock of poultry, promoting ovarian function and increasing egg production. Studies have shown that under red light, the egg production rate of poultry can be increased by 20%. 2. The impact of spectrum on poultry behavior In addition to the physiological impact, the spectrum also affects the behavior of poultry. Blue light and white light can increase the activity level and foraging desire of poultry, which is crucial to improving breeding efficiency. An experiment showed that the activity of chickens under blue light was 10%-15% higher than that under white light. Red light has a calming effect and can reduce conflicts and aggressive behaviors among poultry. Especially in intensive breeding environments, moderate red light can effectively reduce the stress of chickens and improve their quality of life. 3. The impact of spectrum on poultry health The spectrum not only affects the growth and behavior of poultry, but is also closely related to health. Ultraviolet light (UV) can promote the synthesis of vitamin D in poultry, thereby improving calcium absorption, enhancing bone strength, and reducing the risk of fractures. In practical applications, it is crucial to choose an excellent and dimmable LED Chicken farm light. SGL CF150/CF240 Chicken farm light use advanced spectral technology to accurately simulate natural light, and SGL supports customized spectrum for customers' lamps to meet the needs of different poultry farming scenarios. Click here for more information: https://lnkd.in/d5Z_8PyX https://lnkd.in/dZtgrWpz #poultrylamp #livestocklamp #poultrylamp #LEDspectrum #LEDlivestocklamp

How to choose the power and light intensity of LED grow lights? In modern agriculture, LED grow lights?have become an important tool to improve crop growth efficiency. With the advancement of technology, there are more and more types of LED grow lights, and power and light intensity are key parameters to consider when choosing suitable lamps. This article will explain to you how to scientifically choose the power and light intensity of LED grow lights?according to plant needs and planting environment. 1. Plant needs: photosynthesis and light intensity Plant growth is inseparable from photosynthesis, and the efficiency of photosynthesis is closely related to light intensity. Different plants have very different requirements for light, which are usually measured by photosynthetic photon flux density (PPFD, unit: μmol/m2/s). Low-light plants (such as lettuce and vanilla): PPFD requirements are 100-300 μmol/m2/s. Medium-light plants (such as tomatoes and peppers): PPFD requirements are 300-600 μmol/m2/s. High-light plants (such as roses and chrysanthemums): PPFD requirements are 600-1000 μmol/m2/s. Studies have shown that lettuce grows fastest when the PPFD is 200 μmol/m2/s, while tomatoes have the highest yield when the PPFD reaches 500 μmol/m2/s. 2. Planting environment: area and height The larger the area, the more lamps are required and the higher the total power. At the same time, the hanging height of the lamp affects the light intensity distribution. The higher the hanging height, the larger the illumination range, but the light intensity will be weakened. It is usually recommended that the hanging height be 30-60 cm, which is adjusted according to the lamp power and plant needs. Experimental data show that when the hanging height of the LED grow light?is increased from 30 cm to 60 cm, the PPFD value decreases by an average of about 40%. 3. Power and light intensity: efficiency and cost The power (unit: W) of the LED grow light determines its energy consumption, while the light intensity directly affects the growth of the plant. When choosing, you need to balance efficiency and cost. The higher the light efficiency (unit: μmol/J), the more efficient the lamp is in converting electrical energy into light energy, and the more energy-saving it is. High-quality LED grow lights?can have a light efficiency of 2.5-3.0 μmol/J. High-power lamps are usually more expensive, but they cover a larger area and may have a lower cost per unit area. When choosing an LED grow light, the power and light intensity should be considered based on the crop type, the photosynthesis requirements of the plant, the planting area, and the layout of the lamps. SGL can provide customized solutions for customers' grow lights, and provide precise lighting solutions based on different plant planting needs to help efficient agricultural planting. #GreenhouseGrowing #FruitandVegetableGrowing #GrowLightPower #GrowLightIntensity #GrowLightCustomizationSolution