At present, the types of plant lights in the market can be basically divided into three generations:
The first-generation LED plant light has a fixed ratio of red and blue, with constant light intensity, and DC power supply.
The second-generation constant current LED plant light has a fixed ratio of red and blue, with the same light intensity and constant current power supply. Some orange or white light is added to the spectrum, which further enriches the spectrum. No matter how it becomes red and blue, it is still the basis of plant lights, which is determined by the characteristics of red and blue light. At this stage, Peking University Dongguan Biolight Environmental Technology Co., Ltd. took the lead in researching and developing constant current power supply technology to reduce current instability and greatly enhance the life of plant lights.
The third-generation full-spectrum dimmable LED plant light Peking University Dongguan Biolight Environmental Technology Co., Ltd. is the first domestic leader in the red and blue light intensity and proportional 10,000-watt control system. At the same time, violet and infrared light are added to the spectrum, which basically achieves The full spectrum requirements and light intensity meet the entire growth stage of most plants.
Our company combines advanced light system technology with LED and new energy sources and integrates modern industrial design concepts to develop a series of high-quality LED agricultural lighting lamps, LED high-power lamps, LED ultraviolet lamps, and LED special lamps. The newly launched full-spectrum dimmable LED plant light is the first choice for scientific research institutions in universities, colleges and universities.
LED plant lights are small in size, light in weight, solid state, long life, special wavelength, low driving voltage, high light efficiency, low energy consumption, safety, reliability and durability, not easy to color decay, and red light LED photons have the advantages of greater Of luminous flux. In addition, the luminescence of LED is the luminescence of III and V compounds, which has a narrow spectrum. The half-width range of the spectrum is from a few nanometers to tens of nanometers, at about ±20 nm. The wavelength is exactly the same as the spectral range of plant photosynthesis and photomorphism. Coincide. Therefore, using LED as plant lighting for special purposes will have advantages over traditional light sources in terms of efficiency and efficacy. Traditional light sources are generally full-wavelength. If fluorescent lamps are used as light sources, a filter must be added to obtain the required specific wavelength of light. , This will reduce the utilization rate of light and it will be possible for the filtered light source to be converted into the form of heat.
Two key points of plant photosynthesis need to be referred to when designing the intensity of LED plant lights, one is the light compensation point, and the other is the light saturation point.
The light compensation point means that as the light intensity decreases, the photosynthetic rate decreases accordingly. When the light intensity decreases to a certain value, the photosynthetic rate of the leaves is equal to the respiration rate, and the net photosynthetic rate is zero. The light intensity at this time is called light compensation. point. At this time, if you want to continue photosynthesis of the plant, you need additional light compensation.
The light saturation point means above the light compensation point. With the increase of light intensity, the photosynthetic rate increases correspondingly. When a certain light intensity is reached, the photosynthetic rate no longer increases with the increase of light intensity. This phenomenon is called light intensity. Saturation phenomenon. The light intensity at which the maximum photosynthetic rate is reached is called the light saturation point. If the external light intensity is greater than the light saturation point of the plant, it will form a waste of light.
The above introduces the light compensation point and light saturation point of photosynthesis and the values of some main vegetables at these two points. Its specific function is to set the intensity (or power) of the light when preparing the LED plant growth lamp according to different plants. set.
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