Technically, led grow light refers to an electromagnetic radiation with a wavelength that is visible to the eye (otherwise, it is "dark"). Light is a complex factor, ultimately influencing all aspects of plant performance. It is the primary resource for photosynthesis.
When considering plant responses to light, plant growth is influenced by three different properties: intensity, duration and quality of the LED grow light.
Greenhouses or indoor gardening systems are designed to provide non-stressful environmental conditions, optimal temperature, sufficient water supply, nutrients and carbon dioxide. Under such conditions, light often becomes the main limitation to crop growth. In the next, you will find the importance of LED grow light and issues pertaining to the use of supplemental lighting in greenhouses or indoor gardening systems.
In the context of plants, intensity of light refers to the amount of light received per unit area and is usually expressed either in terms of radiant energy flux (Wm-2, or Jm-2s-1) or quantum flux (micromol m-2s-1). Duration refers to the length of the light period. This is important for determining the total amount of light received. On this basis, plants can be categorized to short-day plants, long-day plants and day neutral plants. Quality of LED grow light refers to the type of radiation received by the plant and is usually expressed in wavelength.
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