How do I describe colour for LEDs?
Since LEDs are so saturated (almost 100%), we can use dominant wavelength to describe the colour of an LED. For an LED of a given colour, dominant wavelength is the single wavelength representation of the LEDs perceived colour. Put another way, if the colour of a single wavelength DW is indistinguishable from the colour of a given LED, then that LED has a dominant wavelength of DW. For White Lamps, the x, y coordinates on CIE diagram shows the ‘purity’ of the White. Pure White reference point is 0.32, 0.32.
