The light of 500 - 520nm (blue) and 610 - 720nm (red) contributed the most to photosynthesis. 520 to 610 nm (green) light, the absorption rate of plant pigment is very low.
The plant lamps on the market all provide two wavelengths of red and blue light, covering the wavelength range required for photosynthesis. In terms of visual effect, the plant lights are all pink.
The following is the wavelength table of light emitted by different color LEDs: Royal blue magenta: 445nm 440nm ~ 460nm blue blue: 470nm 460 ~ 490nm
Cyan cyan: 505nm 490 ~ 520nm green green 530nm 520 ~ 550nm red Red: 627nm 620 ~ 645nm
Red Orange: 617nm 613 ~ 620nm amber: 590nm 585 ~ 597nm
It is not difficult to find that the blue (470nm) and red (627nm) LEDs can provide the light needed by plants. Therefore, the ideal choice for LED plant lights is to use these two color combinations.