All visible light sources have an important parameter called luminous flux, and plant lights are no exception. Luminous flux is of great significance to human visual perception. On the one hand, depending on the luminous flux, the visual response of the naked eye is different. On the other hand, depending on the human visual acuity, the visual perception of the same luminous flux in the same band is not same.
Understand the relationship between the naked eye and the luminous flux, then what is the relationship between LED plant light luminous flux and plants? Let’s first look at the concept of luminous flux.
Luminous flux concept
Luminous flux is the radiant power that can be felt by the human eyes. It is the product of the radiant energy of a certain band per unit time and the relative visibility of the band, it is measured by lumens (lm). Because the human eye has different relative viewing rates for different wavelengths, even if the radiant power of different wavelengths is the same, the luminous flux is not equal. Conversely, even if the luminous flux is the same, if it is light of different wavelengths, its radiation power is not the same too.
LED plant light flux and plant growth
Luminous flux can be simply understood as the amount of light passing through given time. Just like a stream of water, it flows out, flows or flows in how much water in one second, and the luminous flux flows out, flows or flows in how much light in one second. That is to say, red light having a wavelength of 680 can reach 1000 (lm) under certain conditions, and green light having a wavelength of 520 can also reach 1000 (lm) under another condition too.
LED plant lights for plants, the most important thing is to emit the red and blue light needed by plants, or the full-spectrum plant light that simulates sunlight, to help grow high quality plants. The main factors to influence the lighting effect of LED plant lights include light quality, light intensity, and illumination time. Therefore, the same 1000 (lm) luminous flux of red and green light, one plant absorbs a lot and the other plant absorbs almost nothing. Therefore, the luminous flux cannot be completely used as an factor which may affect the light-filling effect of plants.
However, if the same wavelength red light required by plants, the greater the luminous flux, indirectly indicates that the LED plant lamp red LED chip have a large amount of light, plants can get more light, and the growth effect will be better.
In summary, for the field of planting plants with LED plant lights, the luminous flux is not the main parameter for measuring the value of LED plant growing lamps, but it can be used as a reference. If the wavelength is determined, the luminous flux is larger, the stronger light it can be provided.