Definitions for "Dominant wavelength"
A measure of the hue sensation perceived by the human eye.
For an LED of a given color, dominant wavelength is the single wavelength representation of the LED's perceived color. Put another way, if the color of a single wavelength DW is indistinguishable from the color of a given LED, then that LED has a dominant wavelength of DW.
A quantitative measure of the color of an LED as perceived by the human eye. It is usually measured in nanometers (a billionth of a meter).