What is a full-spectrum grow light?

Those who use plant fill lights now don't quite understand what the full-spectrum plant fill lights on the market mean. Many friends are looking for this kind of "sun-like" plant lights, subconsciously also looking for the light emitted by the plant lights to be the same as the sunlight.

We all know that sunlight is white to our eyes, but in fact, "white light" contains seven kinds of colored light - red, orange, yellow, green, blue, indigo and purple. The meaning of "is that the light of the plant lamp is the same as the composition of sunlight, but our human eyes must not be able to directly see the seven colors of light.

Triangular prism—Using the principle of refraction of light, we can see the seven colors of light after passing sunlight through the prism due to the principle of refraction of light. Some time ago, a friend bought a plant fill light, and then took it home to measure it with a prism, and finally came to a conclusion: the full-spectrum plant fill light is fake.

Why does my friend say that? The light refracted by the plant fill light through the prism is not seven-color, so it is concluded that the plant light is deceptive.

First of all, I admire my friend for his clear thinking. What he learned in middle school can still be used alive. He can think of measuring the light composition of plant lights through the principle of prism refraction in middle school; secondly, I want to correct ordinary people and plants. Errors in the understanding of full-spectrum plant fill lights in the lighting industry (or friends who are knowledgeable in plant cultivation).

In the plant lighting industry, whether it is opening an online store or doing export trade or offline wholesale, the so-called "full-spectrum plant supplementary light" refers to all kinds of light in the visible light band, from blue light to red light band. The ingredients are all included, and it should be noted here that it is "included" (the light energy of the LED plant fill light is concentrated in the red and blue bands). The spectral components of sunlight and the components of various bands of visible light are very sufficient, pay attention to "sufficient".

At present, there are few plant lights on the market that are exactly the same as sunlight, but from the perspective of the industry, this plant light covering all bands of visible light is called "full-spectrum plant fill light". Going back to the light scattering test using a prism, because the "full-spectrum plant fill light" contains all bands of visible light, so there will definitely be seven colors after scattering, but the components are weaker and less easy to observe.

Then some people may have doubts, why don't these companies that make plant lights make the light of plant lights exactly the same as sunlight? This goes back to what is a plant light? What is this topic used for?

To put it simply, most of the light components needed for the growth of plants are the red and blue bands of visible light. Therefore, the research and development of plant lights naturally highlights the red and blue parts of the light components. This is indeed the case, the light components of the plant lights with red and blue ratios are completely in the red and blue bands. However, with the maturity of LED chip technology getting higher and higher, specific light components can be made on the same lamp bead chip, and the "full spectrum" lighting technology has been pushed to the market in this way. Some plant fill lights use full-spectrum technology and lamp beads.

So, to sum up, as "plant light" and "Xiaobai", we should correctly understand the conceptual difference between the full spectrum and solar spectrum of plant fill light and the practical significance in application.

Post time: Mar-16-2023