Why can LED plant lights replace"sunlight" to regulate the growth of indoor plants?

LED plant lights are known as the indoor "sun",which can replace sunlight and ensure healthy plant growth indoors. The development of indoor agriculture has proved that, for plants, LED plant lights can even exceed the role of sunlight. So,why can LED plant lights replace"sunlight" to regulate the growth of indoor plants? And what advantages does it have over sunlight?This also has to start from the plant's absorption of light utilization.

Plants absorb light mainly through photosynthesis.
ln this process, plants use their "light-trapping antennae",photosynthetic pigments, to absorb sunlight and convert it into chemicalenergy in the form of sugar for storage, which is then used for growth.
At the same time, some of the absorbed light acts as an environmentalsignal to regulate a range of plant growth and developmental behaviors,such as seed germination, morphogenesis, flowering and the synthesis of secondary metabolites.
Light plays an important role in the growth of plants.
Plants are also "picky" about light.

Plants that are bathed in sunlight actually absorb only a small fraction ofthe sunlight, and most of the other sunlight is not used by plants.This is because the wavelength range of sunlight covers the entire electromagnetic spectrum from X-rays to radio waves, while the photosynthetically effective radiation available to plants lies in the visiblelight range (400-780 nm), which is commonly referred to as the seven colors of red, orange, yellow,green, blue, and purple light.

Spectral analysis shows that among the seven colors of light,plants mainly absorb red and blue light for photosynthesis. While green,yellow-orange and far-red traces of light are involved in other metabolic processes of plant growth.
ln addition to the composition of the spectrum,plant growth also requires the appropriate photoperiod and light intensity.
We call the sum of light spectrum, photoperiod, light intensity, and lightmode requirements of plants a light recipe.
Designing a "light recipe" for plants

lt is the "recognition" and "preference" of light by plants that provide sthe theoretical guidance for artificial light cultivation of plants. About the spectrum of the seven colors of light, red and blue light are the main ones that regulate photosynthesis in plants and thus affect yield. This is because when plants sense more red light through their "light trapping antennae", they release a hormone that prevents chlorophyllfrom breaking down. This allows the plant to convert light energy intomore chemical energy and the plant grows more robustly. In addition,plants need red light for proper flowering and fruiting.The plant's blue light receptors trigger a hormonal response when they perceive higher levels of blue light, which slows down the growth of the stems and leaves, so blue light helps the plant's stalks grow thicker. About light intensity & photoperiod, in addition to the composition of the spectrum,plants also need the right light intensity and photoperiod to grow. Within a certain light intensity range, the photosynthetic rate of plantsaccelerates with increasing light intensity, but not just increasing lightintensity. For each plant or each developmental stage,too high lightintensity leads to photoinhibition phenomenon on the one hand, whichaffects yield and quality,and wastes a lot of electrical energy andincreases investment costs on the other hand.

After fully understanding the needs of different plants,different growthstages of the same plant on the light formula, researchers through thedesign of "light recipes", the use of LED "core light" technology,in abalance between yield,,quality and energy consumption,designed to meet the energy needs of plant photosynthesis, but also suitable for theprecise control of its growth and development, while saving energy andcosts in the production of LED plant lights,artificial light instead ofsunlight, to help plants grow healthily. LED plant light with the right light formula can not only ensure theefficient photosynthesis of plants, but also the special light formula canregulate the behavior of plants like a condiment,making vegetablesmore delicious and nutritious,flowers more bright, fruits more sweetand more nutritious.

Controllable "sun"
LED plant light is powerful, it is not only energy efficient and long-lasting,but also low heat output,which can be closer to the plants,ideal forindoor farming.Compared to the sun, the biggest advantage of the LEDplant light is its controllability.
We know that the sun is the source of energy for everything to grow, butit is not infallible.
The rotation of the earth will lead to the sun's position constantlychanging, the sun will also "disappear" in cloudy weather, which meansthat plants can not always enjoy sunbathing. In addition,sunlight isshared by all things and does not favor any one plant, only the plant canadapt to it. The emergence of artificial light, especially the birth of LED plant lights,everything is different. Unlike the instability of the sun, LED plant lights do not change intensitywith day or night, summer or winter, rain or shine, and they provide asteady and consistent light for plants.

ln addition, as mentioned above, we can also precisely design and tailorthe light formula for plants. For example,different light for differentcrops,tomatoes like purple light,more purple light,blueberries preferred light, more red light; for example, different light for different growthstages of the same crop,the plant seedling cell division speed,photosynthesis is strong, so more blue light, so that the seedlings growmore robust; this period of red light is easy to cause plant growth andthin, then control the amount of red light; to the fruiting period, you canmore When the fruiting period comes,you can shine more red light topromote fruit expansion, improve the accumulation of sugar in the fruit,and make the fruit more delicious.LED plant lights allow farmers to get the "sunlight" they need anytimeand anywhere, providing them with something they can't have under thesun, which is "control" .