As an individual buyer, how to choose and buy LED plant fill light
With the rapid development of the economy and the improvement of personal living conditions, and based on the fact that urban life is different from the leisure mode of rural life, more and more people like to plant some flowers and plants in urban buildings, which play a decorative role on the one hand. , On the other hand, it can also relax people's mood, let us get a moment of spiritual relaxation under the busy life.
But planting flowers and plants on the balcony of the building is different from that in the countryside. Plants cannot be planted without water, fertilizer, carbon dioxide, sunlight, etc. Nature has given the soil for the natural growth and development of plants. If we want to plant on the balcony, we must consider these factor. As a result, many industries related to planting have been born, such as flower seeds, planting soil, flower pots and flower boxes, etc.
By purchasing fixed planting containers, seeds or rhizomes, and fertilizers, it can be planted on the indoor balcony. Of course, this kind of planting is completely out of preference, and there is no way to compare it with ordinary field planting in terms of input and output. Compared with the inevitable elements of plant growth such as water and fertilizer, light is an element that is difficult to control artificially, so the product category [plant growth lamp] was born in recent years. Of course, the research and development of plant growth lamps has been almost It has been ten years, and only because of the maturity of LED light source technology and the decline of cost in the past ten years, LED plant lights have gradually entered the public's field of vision.
Figure 1.1 The solar spectrum under direct sunlight
Figure 1.2 The solar spectrum in the non-direct state
The advantage of LED plant lights lies in the controllability of the spectrum of the LED light source and the relative energy saving and high efficiency. It is said that it is controllable because the current technology can make LEDs emit different spectra through chip and packaging technology, and can adjust the proportion of light components in them. Compared with the relative energy saving and high efficiency, it is because compared with some traditional sodium lamps and metal halide lamps, LEDs are superior in energy saving and long life. However, as far as agricultural production is concerned, LED plant lighting technology has not yet been put into production on a large scale. Due to its high electricity cost, it is difficult to commercialize the current energy shortage (in some areas rich in renewable energy).
Now most of the individual users who buy and use LED plant growth lights (or called: plant supplementary light) are supplemented by insufficient light on the balcony to affect the growth of plants. When buying plant lights on Taobao, there will be a "full spectrum" concept. , here I want to explain to you what a full spectrum is. In fact, most of the full spectrum refers to the inclusion of various light components in the wavelength range of 400-780nm of visible light, because the sunlight reaching the surface contains all kinds of light components, so it is called full-spectrum LED in the market. It refers to various light components that contain visible light bands, so in addition to the description of "full spectrum" we can see on plant lights, we can see related full-spectrum descriptions on some household, commercial and desk lamps.
Figure 2 The full spectrum of a certain brand desk lamp
So what is the difference between the full spectrum of plant lights? You can see Figure 3 and Figure 4. The blue light component of 460nm and the red light component of 660nm have the greatest impact on plant growth. The blue light of 460nm has a great effect on the early stage of plant growth, which can help plants establish a well-developed root system and strengthen branches. The sturdiness of the stem makes the plant grow more symmetrical and healthy, and helps the plant to synthesize protein and amino acids. The combination of 660nm red light and blue light will have a more significant impact on plant growth, improve the photosynthetic efficiency of plants, make plants grow taller, and help plants produce carbohydrates.
Then everyone should pay attention when purchasing plant lights. If it is a plant with long roots and long leaves, the plant fill light with a lot of blue light components is relatively more suitable. Lights are more suitable. If you find that the blue light peak is not around 460nm and the red light peak is not around 660nm when you buy the plant fill light, then it must be a fake plant fill light in terms of light composition (light quality). , There are quite a lot of this kind of lights on the market now, and everyone still needs to distinguish them carefully.
Figure 3, 4 Conventional full-spectrum white light, full-spectrum pink light
As for the light components of green light and yellow-green light, the current research is not fully clear, but it is certain that most of the green light is not absorbed by plants, but is reflected by plants, so the plants we see appear green. Some studies have shown that green light will play a greater role under strong light, and green light can also reduce the visual pollution of the human eye (some plant lights have high blue light content, and the human eye is not easy to look directly at for a long time).
Apart from the above-mentioned light components (light quality) required by plants and that plant lights should provide, lamps and lanterns are consumer goods, and their material and workmanship should also be considered by buyers. In addition to light quality factors, light intensity is also a factor that many users The factors to be considered are that the plants should reach the light saturation point, the light intensity is not enough, and the plants under low light and little light will look "sick". It is easy to understand that in the case of ensuring the correct light quality, the greater the power of the lamp The greater the intensity, the distance from the light source of the same type of lamp to the plant is also proportional to the light intensity. The closer the distance, the stronger the light intensity. This is why some sellers recommend that the lamp be closer to the plant.
0
English
