The Principles of LED Grow Lights for Herbs

In recent years, with the accumulation and maturity of knowledge and technology, plant growth lamps, regarded as the high-tech agricultural symbols in China, have gradually entered the field of vision. With the gradual deepening of the spectral research, it is also found that the effects of light in different bands on plant growth stages are also different. The significance of the greenhouse interior lighting is to extend enough light intensity in a day. It is mainly used for the vegetables, roses or Chrysanthemum seedlings planted in late autumn and winter.

On cloudy and low light intensity days, artificial lighting is necessary. At least 8 hours of light should be given to the crops at night, and the time of light should be fixed every day. However, the lack of night rest will also lead to plant growth disorder and yield reduction. Under the fixed environmental conditions such as carbon dioxide, water, nutrients, temperature and humidity, the "photosynthetic photon flux density PPFD" between the specific plant light saturation point and the light compensation point directly determines the relative growth rate the plants. Therefore, an efficient combination of the light source PPFD is the key to the production efficiency of the plant factories. Therefore, the uv light for herbs are necessary.

Ⅰ. The characteristics of the LED grow lights for herbs

The LED grow lights for herbs should have the following characteristics: 

1. The efficient conversion of electrical energy into radiation energy. 

2. Achieve the high radiation intensity within the effective range of photosynthesis, especially the low infrared radiation (thermal radiation). 

3. The radiation spectrum of the bulb meets the physiological requirements of plants, especially in the effective spectrum area of photosynthesis.

Ⅱ. The mechanism of the UV light for herbs

The led herb grow light is a kind of plant lamp. It is a kind of lamp based on the growth law of plants, light-emitting diode (LED) as a light source, and use light instead of sunlight to create the plant growth and development environment. The LED uv light for herbs help to shorten the growth cycle of the plants. The light source is mainly composed of red and blue. It uses the most sensitive light band of the plants. The red light wavelength is 630nm and 640 to 660nm, and the blue light wavelength is 450 to 460nm and 460 to 470nm. These light sources can make plants give full play to the best photosynthesis and make plants have the best growth state. Light is one of the indispensable physical environmental factors in the process of plant growth and development. Controlling the formation of the plant morphology through the regulation of light quality is an important technology in protected cultivation.

The area of protected horticulture is developing rapidly, and the control of the light environment for the plant growth and the lighting technology has attracted attention. The facility gardening lighting technology is mainly applied to three aspects: the herb light growers are used as the supplementary lighting for the photosynthesis when the plants are short in sunshine or short in sunshine hours. The uv light for herbs are used as the inducible lighting for the plant photoperiod and morphology. And it is the main lighting of the plant factory.

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