2022-06-10
Many LED lighting suppliers will say that full spectrum LED grow lights are the best choice for growing plants because they mimic natural light from the sun. Because: "Plants have grown in the sun for millions of years. Why should we change the best things nature knows?"
This is a good idea, but in fact, the full spectrum that most manufacturers say is not the sunlight spectrum, and the real sunlight spectrum does not exist on the market, or plants do not need it.
First of all, what is contained in sunlight is very complex, including X-rays, radio waves, etc., so far scientists have not figured out, but regardless of which ones are not considered, sunlight also contains a very broad spectrum such as UV and far red. As shown below
According to most of the current research, plants do not actually need such a wide spectrum, of which the PAR range is the most famous, PAR refers to the spectrum in the range of 400-700nm. The prevailing view is that this range of the spectrum is the one that allows plants to photosynthesize most efficiently. The traditional view also believes that in this range, red light and blue light are the most efficient. Therefore, most of the early LED grow lights are composed of red LEDs and blue LEDs. The color of this grow light is purple.
Later, it was found that green light actually has a synergistic contribution to the photosynthesis of plants, and it was felt that during the planting process of purple light, it was difficult for people to observe the appearance of plants, so as to de