The principle and characteristics of plant growth lights

In recent years, with the accumulation and maturity of knowledge and technology, the plant growth lamp, which has always been considered as a symbol of high-tech modern agriculture, has gradually entered people's field of vision. With the gradual deepening of spectral research, it has been found that different wavelengths of light have different effects on different growth stages of plants. The significance of lighting inside the greenhouse is to extend enough light intensity throughout the day. Mainly used for growing vegetables, roses and even chrysanthemum seedlings in late autumn and winter.

Artificial lighting is a must on cloudy and low-light-intensity days. Give crops at least 8 hours of light per day at night, and the time of day should be fixed. But lack of nighttime rest can also lead to disordered plant growth and reduced yields. Under the fixed environmental conditions such as carbon dioxide, water, nutrients, temperature and humidity, the "photosynthetic light flux density PPFD" between the light saturation point and the light compensation point of a specific plant directly determines the relative growth rate of the plant. Therefore, an efficient light source PPFD Combination is the key to plant factory productivity.

Arrangement of fill light time

1. As a supplementary light, the light can be enhanced at any time of the day, and the effective lighting time can be prolonged.
2. Whether at dusk or at night, it can effectively extend and scientifically control the light required by plants.
3. In the greenhouse or plant laboratory, it can completely replace natural light and promote plant growth.
4. Completely solve the situation of watching the sky and eat in the seedling stage, and arrange the time reasonably according to the delivery date of the seedlings.

Choice of grow lights

The scientific choice of light source can better grasp the speed and quality of plant growth. When using artificial light sources, we must choose natural light that is closest to the conditions for plant photosynthesis. Measure the photosynthetic luminous flux density PPFD (Photosynthetic PhotonFlux Density) produced by the light source to the plant, grasp the rate of plant photosynthesis and the efficiency of the light source, and the amount of photosynthetically effective photons in the chloroplast to initiate the photosynthesis of plants: including light reaction and subsequent dark reaction.

Plant grow lights should have the following characteristics

1. Efficiently convert electrical energy into radiant energy.
2. High radiation intensity, especially low infrared radiation (thermal radiation), in the effective range of photosynthesis
3. The emission spectrum of the bulb meets the physiological requirements of plants, especially in the effective spectral region of photosynthesis.

Plant fill light principle

LED plant fill light is a kind of plant light, which uses light-emitting diode (LED) as the light source and replaces sunlight with light according to the law of plant growth to create a plant growth and development environment. LED grow lights help to shorten the growth cycle of plants. The light source is mainly composed of red and blue light sources, using the most sensitive light bands for plants. The red light wavelengths use 630nm and 640-660nm, and the blue light wavelengths use 450-460nm and 460-470nm. These light sources can allow plants to produce the best photosynthesis, so that plants get the best growth state. Light environment is one of the important physical environmental factors that are indispensable for plant growth and development. Controlling plant morphogenesis through light quality regulation is an important technology in the field of facility cultivation.