... light wavelengths using 620-630 and 640-nm 660 nm, blu-ray use 450-460 nm wavelength and 460-470 nm. The ... red light promote plant sprouts, flowering, blu-ray promote plant growth, and you can independently choose the more ... .3. The above products parameters for the lamps conventional proportion (blu-ray: red light = 1:8) parameters, is for reference only, the ...