All the “whites” (warm white, natural white, cold white and so on) on led lights are combinations of red + blue light emitting junctions covered in a phosporous mask to “smooth” the spectrum distribution of the resulting light (otherwise the light would be purelly a peak at a very specific wavelength on the red part of the spectrum and a similar peak on the blue part of the spectrum).
White LED is blue LED with a facemask
All the “whites” (warm white, natural white, cold white and so on) on led lights are combinations of red + blue light emitting junctions covered in a phosporous mask to “smooth” the spectrum distribution of the resulting light (otherwise the light would be purelly a peak at a very specific wavelength on the red part of the spectrum and a similar peak on the blue part of the spectrum).